Diodes AP7168 User Manual
Ap7168, 2a low dropout regulator with pok, New prod uc t description
AP7168
1.2A LOW DROPOUT REGULATOR WITH POK
AP7168
Document number: DS32019 Rev. 2 - 2
1 of 11
September 2010
© Diodes Incorporated
NEW PROD
UC
T
Description
The AP7168 is a 1.2A, adjustable output voltage, ultra-low
dropout linear regulator. The device includes pass element,
error amplifier, band-gap reference, current limit and thermal
shutdown circuitry. The device is turned on when EN pin is
set to logic high level. A Power-OK (POK) output is available
for power sequence control.
The characteristics of the low dropout voltage and low
quiescent current make it suitable for low to medium power
applications, for example, laptop computers, audio and video
applications, and battery powered devices. The typical
quiescent current is approximately 125µA.
Built-in current-limit and thermal-shutdown functions prevent
IC from damage in fault conditions. The AP7168 is available
in SO-8EP package.
Features
•
Wide input voltage range: 2.2V – 5.5V
•
230mV very low dropout at 500mA load
•
500mV very low dropout at 1A load
•
Very low quiescent current (I
Q
): 125µA typical
•
Adjustable output voltage range: 0.8V to 5.0V
•
Very fast transient response
• High
PSRR
•
Accurate voltage regulation
•
Current limiting and short circuit protection
•
Thermal shutdown protection
•
Stable with any type output capacitor
≥ 4.7µF
•
Ambient temperature range -40ºC to 85°C
•
SO-8EP: Available in “Green” Molding Compound (No
Br, Sb)
•
Lead Free Finish/ RoHS Compliant (Note 1)
Pin Assignments
NC
NC
EN
IN
FB
GND
OUT
( Top View )
1
2
3
4
8
7
6
5
POK
SO-8EP
Applications
•
Servers and laptops
•
Smart phone and PDA
• MP3/MP4
• Bluetooth
headset
•
Low and medium power applications
•
FPGA and DSP core or I/O power
Notes:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
Typical Application Circuit
1µF
IN
GND
EN
OUT
Enable
FB
10µF
V
IN
V
OUT
POK
100kOhm
R
1
R
2
AP7168
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
+
=
2
1
REF
OUT
R
R
1
V
V