Diodes AP7311 User Manual
AP7311
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
Features
• 150mA Low Dropout Regulator with EN
• Very low I
• 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 at 100Hz
• Fast start-up time: 80µs
• Stable with low ESR, 1µF ceramic output capacitor
• Excellent Load/Line Transient Response
• Low dropout: 150mV typical at 150mA
• Current limit protection
• Short circuit protection
• Thermal shutdown protection
• Ambient temperature range: -40ºC to 85°C
• SOT25: Available in “Green” Molding Compound
(No Br, Sb)
• Lead Free Finish/RoHS Compliant (Note 1)
over full load: 65µA
Q
Applications
• Notebook and Desktop Computers and Pheripherals
• Portable Devices
• Battery Powered Devices
• CD-ROM, DVD and LAN Cards
Typical Application Circuit
V
IN
IN
OUT
Description
The AP7311 is a 150mA, 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 AP7311 is available in SOT25 package.
V
OUT
V
IN
IN
OUT
V
OUT
AP7311
EN
Adjustable O u tp u t
ADJ
GND
R1
1uF
R2
1uF
Enable
AP7311
EN
GND
Fixed Output
1uF
1uF
Enable
⎛
⎜
1VV
REFOUT
⎜
⎝
⎞
R
1
⎟
+=
⎟
R
2
⎠
AP7311 Rev. 2 1 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
Ordering Information
AP7311
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
AP7311 - XX XX G - 7
Output
Blank : ADJ
Package Green
W : SOT25
G : Green
Packing
7 : Tape & Reel
10 : 1.0V
12 : 1.2V
15 : 1.5V
18 : 1.8V
20 : 2.0V
25 : 2.5 V
28 : 2.8V
30 : 3.0V
33 : 3.3V
Device Package Code
Packaging
(Note 2)
AP7311-XXWG-7 W SOT25 3000/Tape & Reel -7
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/datasheets/ap02001.pdf.
http://www.diodes.com/products/lead_free.html
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
7” Tape and Reel
Quantity Part Number Suffix
AP7311 Rev. 2 2 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
Pin Assignment
(1) SOT25 (Fixed Output) (2) SOT25 (Adj Output)
AP7311
( Top View )
1
IN
2
GND
3
EN
5
4
OUT
NC
IN
GND
EN
( Top View )
1
2
3
5
4
OUT
Pin Descriptions
Pin Number
Pin Name
IN 1 1 Voltage input pin. Bypass to ground through at least 1µF capacitor
GND 2 2 Ground
EN 3 3 Enable input, active high
ADJ - 4 Output feedback pin
NC 4 - No connection
OUT 5 5
SOT25
(fixed)
SOT25
(adj)
Voltage output pin. Bypass to ground through 1µF ceramic
capacitor
Description
ADJ
AP7311 Rev. 2 3 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
Functional Block Diagram
AP7311
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
IN
EN
Gate
Driver
Fixed Version
Current Limit
and Thermal
Shutdown
0.4V
OUT
R
R
GND
IN
EN
Gate
Driver
Adjusta b le V e r s io n
Current Limit
and Thermal
Shutdown
0.4V
OUT
ADJ
GND
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 3) SOT25 640 mW
TJ Maximum Junction Temperature 150 °C
Recommended Operating Conditions
Symbol Parameter Min Max Unit
V
IN
I
OUT
T
A
Notes: 3. Ratings apply to ambient temperature at 25°C
4. The device maintains a stable, regulated output voltage without a load current.
AP7311 Rev. 2 4 of 13 NOVEMBER 2009
Input voltage 2 6 V
Output Current (Note 4) 0 150 mA
Operating Ambi e nt Temperature -40 85
°C
www.diodes.com © Diodes Incorporated
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