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AP7331 Datasheet

Diodes Incorporated

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Datasheet

AP7331
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
AP7331
Document number: DS31914 Rev. 3 - 2 1 of 13
www.diodes.com January 2011
© Diodes Incorporated
Description
The AP7331 is a 300mA, adjustable and fixed output
voltage, low dropout linear regulator. The device included
pass element, error amplifier, band-gap, current limit and
thermal shutdown circuitry. The device is turned on when EN
pin is set to logic high level.
The characteristics of low dropout voltage and low quiescent
current make it suitable for low power applications, for
example, battery powered devices. The typical quiescent
current is approximately 65μA.
Built-in current-limit and thermal-shutdown functions prevent
IC from damage in fault conditions.
The AP7331 is available in SOT25 and DFN2020-6
packages.
Pin Assignments
Features
300mA Low Dropout Regulator with EN
Very low IQ over full load: 65µA
Wide input voltage range: 2V to 6V
Wide adjustable output: 0.8V to 5.0V
Fixed output options: 1.0V to 3.3V
PSRR: 65dB typical at 100Hz
Fast start-up time: 80µs
Stable with low ESR, 1µF ceramic output capacitor
Excellent Load/Line Transient Response
Low dropout: 300mV typical at 300mA
Current limit protection
Short circuit protection
Thermal shutdown protection
Ambient temperature range: -40ºC to 85°C
SOT25 and DFN2020-6: Available in “Green” Molding
Compound (No Br, Sb)
Lead Free Finish/RoHS Compliant (Note 1)
Applications
XDSL Routers
Wireless LAN Cards
Desktop and Notebook Computers
Battery Powered Equipments
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html
IN
EN
OUT
5
3
2
1
GND
NC
4
GND
OUT
4IN
EN
NC
5
3
2
1NC
6
GND
OUT
4
IN
EN
NC
5
3
2
1ADJ
6
SOT25 (Fixed Output)
(Top View)
SOT25 (ADJ Output)
(Top View)
DFN2020-6 (Fixed Output)
(Top View)
DFN2020-6 (ADJ Output)
(Top View)
AP7331
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
AP7331
Document number: DS31914 Rev. 3 - 2 2 of 13
www.diodes.com January 2011
© Diodes Incorporated
Typical Application Circuit
1uF
IN
GND
EN
OUT
Enable 1uF
VIN VOUT
AP7331
Fixed Output
1uF
IN
GND
EN
OUT
Enable ADJ
R2
R1 1uF
VIN VOUT
AP7331
Adjustable Output
Pin Descriptions
Pin Name Pin Numbe
r
Description
SOT25
(fixed) DFN2020-6
(fixed) SOT25
(adj) DFN2020-6
(adj)
IN 1 3 1 3
Voltage input pin. Bypass to ground through at least
1µF capacitor
GND 2 2 2 2 Ground
EN 3 1 3 1 Enable input, active high
ADJ - - 4 6 Output feedback pin
NC 4 5, 6 - 5 No connection
OUT 5 4 5 4
Voltage output pin. Bypass to ground through 1µF
ceramic capacitor
Functional Block Diagram
IN
EN
GND
OUT
Gate
Driver
0.4V
Current Limit
and Thermal
Shutdown
Fixed Version
R
R
IN
EN
GND
ADJ
OUT
Gate
Driver
0.4V
Current Limit
and Thermal
Shutdown
Adjustable Version
+= 2
R1
R
1
REF
V
OUT
V
AP7331
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
AP7331
Document number: DS31914 Rev. 3 - 2 3 of 13
www.diodes.com January 2011
© Diodes Incorporated
Absolute Maximum Ratings
Symbol Parameter Ratings Units
ESD HBM Human Body Model ESD Protection 6 kV
ESD MM Machine Model ESD Protection 400 V
VIN Input Voltage 7 V
EN Voltage VIN + 0.3 V
Continuous Load Current Internal Limited
TOP Operating Junction Temperature Range -40 ~ 125 °C
TST Storage Temperature Range -65 ~150 °C
PD Power Dissipation (Note 2) SOT25 640 mW
DFN2020-6 740 mW
TJ Maximum Junction Temperature 150 °C
Recommended Operating Conditions
Symbol Parameter Min Max Unit
VIN Input voltage 2 6 V
IOUT Output Current (Note 3) 0 300 mA
TA Operating Ambient Temperature -40 85 °C
Notes: 2. Ratings apply to ambient temperature at 25°C
3. The device maintains a stable, regulated output voltage without a load current.
AP7331
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
AP7331
Document number: DS31914 Rev. 3 - 2 4 of 13
www.diodes.com January 2011
© Diodes Incorporated
Electrical Characteristics
(TA = 25oC, VIN = VOUT +1V, CIN = 1uF, COUT = 1uF, VEN = 2V, unless otherwise stated)
Symbol Parameter Test Conditions Min Typ. Max Unit
IQ Input Quiescent Current VEN = VIN, IOUT = 0mA
55 75 μA
VEN = VIN, IOUT = 300mA 65 85
ISHDN Input Shutdown Current VEN = 0V, IOUT = 0mA
1 μA
ILEAK Input Leakage Current VEN = 0V, OUT grounded
1 μA
VDropou
t
Dropout Voltage (Note 4) IOUT = 300mA 300 550 mV
VREF ADJ Reference Voltage (Adjustable version) IOUT= 0mA 0.4 V
IADJ ADJ Leakage (Adjustable version)
1 μA
VOUT Output Voltage Accuracy TA = -40oC to 85oC,
IOUT = 30mA -2 2 %
ΔVOUT
/ΔVIN/V Line Regulation VIN = (VOUT +1V) to VIN-Max,
VEN = VIN, IOUT = 1mA 0.01 0.20 %/V
ΔVOUT
/VOUT Load Regulation VIN = (VOUT +1V) to VIN-Max,
IOUT from 1mA to 300mA -0.6 0.6 %
tST Start-up Time VEN = 0V to 2.0V, VOUT = 1V,
IOUT = 300mA 80 μs
PSRR PSRR VIN = [VOUT +1V]VDC + 0.5VppAC,
f = 100Hz, IOUT =30mA 65 dB
ISHORT Short-circuit Current VIN = VIN-Min to VIN-Max,
VOUT < 0.2V 100 mA
ILIMIT Current Limit VOUT/ROUT = 1A 400 600 mA
VIL EN Input Logic Low Voltage VIN = VIN-Min to VIN-Ma
x
0.4 V
VIH EN Input Logic High Voltage VIN = VIN-Min to VIN-Max 1.4 V
IEN EN Input Current VIN = 0V or VIN
-
Ma
x
-1 1 μA
TSHDN Thermal Shutdown Threshold 140 °C
THYS Thermal Shutdown Hysteresis 15 °C
θJA Thermal Resistance Junction-to-Ambient SOT25 (Note 5) 190 oC/W
DFN2020-6 (Note 6) 167 oC/W
Notes: 4. Dropout voltage is the voltage difference between the input and the output at which the output voltage drops 2% below its nominal value.
This parameter only applies to output voltages above 1.8V.
5. Test conditions for SOT25: Device mounted on FR-4 substrate PCB, with minimum recommended pad layout, 2oz copper, single sided
6. Test conditions for DFN2020-6: Device mounted on FR-4 substrate PCB, with minimum recommended pad layout, 2oz copper, double sided,
bottom layer is a copper plane.
AP7331
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
AP7331
Document number: DS31914 Rev. 3 - 2 5 of 13
www.diodes.com January 2011
© Diodes Incorporated
Typical Characteristics
Quiescent Current vs Input Voltage
Iload=300mA
54
55
56
57
58
59
60
61
62
4.3 4.5 4.7 4.9 5.1 5.3 5.5 5.7 5.9 6.1
Input Voltage (V)
Quiescent Current (uA)
Quiescent Current vs Input Voltage
Iload=0mA
42
44
46
48
50
52
54
56
4.3 4.5 4.7 4.9 5.1 5.3 5.5 5.7 5.9 6.1
Input Voltage (V)
Quiescent Current (uA)
Reference Voltage vs Input Voltage
0.38
0.385
0.39
0.395
0.4
0.405
0.41
4.3 4.5 4.7 4.9 5.1 5.3 5.5 5.7 5.9 6.1
Input Voltage (V)
Reference Voltage (V)
Line Regulation (%/V)
0
0.02
0.04
0.06
0.08
0.1
4.3 4.5 4.7 4.9 5.1 5.3 5.5 5.7 5.9 6.1
Input Voltage (V)
Output Voltage Variation (%/V)
Load Regulation (%)
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0 50 100 150 200 250 300
Output Current (mA)
Output Voltage Variation (%)
Dropout Voltage
0
50
100
150
200
250
300
350
400
0 50 100 150 200 250 300
Output Current (mA)
Dropout Voltage (mV)
90°C
-45°C 25°C
90°C
90°C
25°C
25°C -45°C
90°C
25°C
-45°C
25°C -45°C 90°C
90°C
-45°C
25°C
-45°C
VOUT = 3.3V VOUT = 3.3V
VOUT = 3.3V
VIN = VOUT +1V
VOUT = 3.3V
VIN = VOUT + 1V VOUT = 3.3V
AP7331
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
AP7331
Document number: DS31914 Rev. 3 - 2 6 of 13
www.diodes.com January 2011
© Diodes Incorporated
Typical Characteristics (Continued)
Short Circuit vs Input Voltage
80
85
90
95
100
105
110
115
3.5 4 4.5 5 5.5 6
Input Voltage (V)
Output Current (mA)
Current Limit vs Input Voltage
400
450
500
550
600
2.8 3.2 3.6 4 4.4 4.8 5.2 5.6 6
Input Voltage (V)
Current Limit (mA)
PSRR
35
40
45
50
55
60
65
70
0.1 1 10 100
Frequency (kHz)
PSRR (dB
)
PSRR
35
40
45
50
55
60
65
70
0.1 1 10 100
Frequency (kHz)
PSRR (dB
)
90°C
-45°C
25°C
TA = 25°C
VOUT = 1.8V
VOUT=3.3V
VOUT = 1.8V
VIN = 2.8V
CIN = COUT = 1uF
TA = 25°C
VOUT = 3.3V
VIN = 4.3V
CIN = COUT = 1uF
TA = 25°C
AP7331
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
AP7331
Document number: DS31914 Rev. 3 - 2 7 of 13
www.diodes.com January 2011
© Diodes Incorporated
Typical Characteristics (Continued)
Start-Up Time (No Load)
Time (50us/div)
Start-Up Time (300mA Load)
Time (50us/div)
Line Transient Response
Time (50us/div)
Line Transient Response
Time (50us/div)
Load Transient Response
Time (100us/div)
Load Transient Response
Time (100us/div)
VEN = 0 to 2V (1V/div)
VIN = 4.3V
CIN = COUT =1uF
VOUT = 3.3V (1V/div)
VEN = 0 to 2V (1V/div)
VIN = 4.3V
CIN = COUT =1uF
VOUT = 3.3V (1V/div)
VOUT = 3.3V (50mV/div)
IOUT = 300mA (300mA/div)
VIN = 5.3V to 4.3V (1V/div)
Tf =1 0us
VIN =4.3V to 5.3V (1V/div)
Tr = 10us
VOUT = 3.3V (50mV/div)
IOUT = 300mA (300mA/div)
IOUT = 300mA (300mA/div)
IOUT = 1mA to 300mA
(100mA/div)
VOUT = 3.3V
(100mV/div)
Tr = Tf = 10us
VIN =4.3V
VOUT = 0.8V
(100mV/div)
IOUT = 1mA to 300mA
(100mA/div)
Tr = Tf = 10us
VIN = 2V
AP7331
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
AP7331
Document number: DS31914 Rev. 3 - 2 8 of 13
www.diodes.com January 2011
© Diodes Incorporated
Application Note
Input Capacitor
A 1μF ceramic capacitor is recommended to connect
between VIN and GND pins to decouple input power supply
glitch and noise. The amount of the capacitance may be
increased without limit. This input capacitor must be
located as close as possible to the device to assure input
stability and less noise. For PCB layout, a wide copper
trace is required for both VIN and GND. A lower ESR
capacitor allows the use of less capacitance, while higher
ESR type requires more capacitance.
Output Capacitor
The output capacitor is required to stabilize and help
transient response for LDO. The AP7331 is stable with
very small ceramic output capacitors. The recommended
capacitance is from 1μF to 4.7μF, Equivalent Series
Resistance (ESR) is from 10mΩ to 200mΩ, and
temperature characteristic is X7R or X5R. Higher
capacitance values help to improve load/line transient
response. The output capacitance may be increased to
keep low undershoot/overshoot. Place output capacitor as
close as possible to OUT and GND pins, and keep the
leads as short as possible.
Adjustable Operation
The AP7331 provides output voltage from 0.8V to 5.0V
through external resistor divider as shown below.
1uF
IN
GND
EN
OUT
Enable ADJ
R2
R1
1uF
VIN VOUT
AP7331
The output voltage is calculated by:
+= 2
R1
R
1
REF
V
OUT
V
Where VREF=0.4V (the internal reference voltage)
Rearranging the equation will give the following that is
used for adjusting the output to a particular voltage:
= 1
REF
VOUT
V
2
R
1
R
To maintain the stability of the internal reference voltage,
R2 need to be kept smaller than 125kΩ.
No Load Stability
Other than external resistor divider, no minimum load is
required to keep the device stable. The device will remain
stable and regulated in no load condition.
ON/OFF Input Operation
The AP7331 is turned on by setting the EN pin high, and
is turned off by pulling it low. If this feature is not used,
the EN pin should be tied to IN pin to keep the regulator
output on at all time. To ensure proper operation, the
signal source used to drive the EN pin must be able to
swing above and below the specified turn-on/off voltage
thresholds listed in the Electrical
Characteristics section under VIL and VIH.
Current Limit Protection
When output current at OUT pin is higher than current
limit threshold, the current limit protection will be
triggered and clamp the output current to approximately
600mA to prevent over-current and to protect the
regulator from damage due to overheating.
Short Circuit Protection
When OUT pin is short-circuit to GND or OUT pin voltage
is less than 200mV, short circuit protection will be
triggered and clamp the output current to approximately
100mA. This feature protects the regulator from over-
current and damage due to overheating.
Thermal Shutdown Protection
Thermal protection disables the output when the junction
temperature rises to approximately +140°C, allowing the
device to cool down. When the junction temperature
reduces to approximately +125°C the output circuitry is
enabled again. Depending on power dissipation, thermal
resistance, and ambient temperature, the thermal
protection circuit may cycle on and off. This cycling limits
the heat dissipation of the regulator, protecting it from
damage due to overheating.
Ultra Fast Start-up
After enabled, the AP7331 is able to provide full power in
as little as tens of microseconds, typically 80µs, without
sacrificing low ground current. This feature will help load
circuitry move in and out of standby mode in real time,
eventually extend battery life for mobile phones and other
portable devices.
Fast Transient Response
Fast transient response LDOs can extend battery life.
TDMA-based cell phone protocols such as Global
System for Mobile Communications (GSM) have a
transmit/receive duty factor of only 12.5 percent, enabling
power savings by putting much of the baseband circuitry
into standby mode in between transmit cycles. In
baseband circuits, the load often transitions virtually
instantaneously from 100µA to 100mA. To meet this load
requirement, the LDO must react very quickly without a
large voltage drop or overshoot — a requirement that
cannot be met with conventional, general-purpose LDOs.
AP7331
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
AP7331
Document number: DS31914 Rev. 3 - 2 9 of 13
www.diodes.com January 2011
© Diodes Incorporated
Application Note (Continued)
Fast Transient Response (Continued)
The AP7331’s fast transient response from 0 to 300mA
provides stable voltage supply for fast DSP and GSM
chipset with fast changing load.
Small Overshoot and Undershoot
The AP7331 has small and controlled overshoot and
undershoot in load and line transitions. This helps to
protect supplied circuit from damage and operation error
caused by glitches. This feature also permits the usage
of small value output decoupling capacitor with AP7331.
Low Quiescent Current
The AP7331, consuming only around 65µA for all input
range and output loading, provides great power saving in
portable and low power applications.
Wide Output Range
The AP7331, with a wide output range of 0.8V to 5.0V,
provides a versatile LDO solution for many portable
applications.
Ordering Information
AP7331 - XX XX G - 7
Packing
Package Green
W : SOT25 G : Green 7 : Tape & Reel
SN : DFN2020-6
Blank : ADJ
10 : 1.0V
Output
12 : 1.2V
15 : 1.5V
18 : 1.8V
25 : 2.5V
28 : 2.8V
30 : 3.0V
33 : 3.3V
20 : 2.0V
Device Package Code Packaging
(Note 7) 7” Tape and Reel
Quantity Part Number Suffix
AP7331-XXWG-7 W SOT25 3000/Tape & Reel -7
AP7331-XXSNG-7 SN DFN2020-6 3000/Tape & Reel -7
Note: 7. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
Marking Information
1. SOT25
AP7331
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
AP7331
Document number: DS31914 Rev. 3 - 2 10 of 13
www.diodes.com January 2011
© Diodes Incorporated
1 2 3
5
7
4
XX YW X
( Top View )
XX : Identification code
W : Week : A~Z : 1~26 week;
X : A~Z : Green
Y : Year 0~9
a~z : 27~52 week; z represents
52 and 53 week
Device Package Identification Code
AP7331-ADJ SOT25 QJ
AP7331-10 SOT25 QK
AP7331-12 SOT25 QL
AP7331-15 SOT25 QM
AP7331-18 SOT25 QN
AP7331-20 SOT25 QT
AP7331-25 SOT25 QP
AP7331-28 SOT25 QQ
AP7331-30 SOT25 QR
AP7331-33 SOT25 QS
2. DFN2020-6
Y : Year : 0~9
( Top View )
Y WX
XX XX : Identification Code
X : A~Z : Green
W : Week : A~Z : 1~26 week;
a~z : 27~52 week; z represents
52 and 53 week
Device Package Identification Code
AP7331-ADJ DFN2020-6 QJ
AP7331-10 DFN2020-6 QK
AP7331-12 DFN2020-6 QL
AP7331-15 DFN2020-6 QM
AP7331-18 DFN2020-6 QN
AP7331-20 DFN2020-6 QT
AP7331-25 DFN2020-6 QP
AP7331-28 DFN2020-6 QQ
AP7331-30 DFN2020-6 QR
AP7331-33 DFN2020-6 QS
Package Outline Dimensions (All Dimensions in mm)
1. Package Type: SOT25
AP7331
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
AP7331
Document number: DS31914 Rev. 3 - 2 11 of 13
www.diodes.com January 2011
© Diodes Incorporated
2. Package Type: DFN2020-6
0.05 M C A B
B
0.15
Bottom View
A
C
0/0.05
0.57/0.63
0.15max.
C
0.15 C
2x-
2x
0.08 C
0.05 C
Seating plane
1.45/1.65
1.95/2.075
0.30/0.40
0.2/0.3
0.65nom.
0.76/0.96
1.95/2.075
Pin#1 ID
R0.1
Marking
0.43mon.
(Active area depth)
Tape Orientation (Note 8)
DFN2020-6
AP7331
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
AP7331
Document number: DS31914 Rev. 3 - 2 12 of 13
www.diodes.com January 2011
© Diodes Incorporated
Notes: 8. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf
AP7331
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
AP7331
Document number: DS31914 Rev. 3 - 2 13 of 13
www.diodes.com January 2011
© Diodes Incorporated
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS
DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other
changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability
arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any
license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described
herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies
whose products are represented on Diodes Incorporated website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized
sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall
indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names
and markings noted herein may also be covered by one or more United States, international or foreign trademarks.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without
the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided
in the labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected
to cause the failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or
systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements
concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems,
notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further,
Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes
Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2011, Diodes Incorporated
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IC REG LINEAR 3V 300MA 6DFN2020
Cantidad disponible0
Precio por unidad0.13902