APL5620 Datasheet, PDF (1/18 Pages) Anpec Electronics Coropration – 2A, Ultra Low Dropout (0.24V Typical) Linear Regulator

APL5620
2A, Ultra Low Dropout (0.24V Typical) Linear Regulator
Features
General Description
• Ultra Low Dropout
- 0.24V (typical) at 2A Output Current
• 0.8V Reference Voltage
• High Output Accuracy
- ±1.5% Over Line, Load, and Temperature Range
• Fast Transient Response
• Adjustable Output Voltage
• Power-On-Reset Monitoring on Both VCNTL and
VIN Pins
• Internal Soft-Start
• Current-Limit and Short Current-Limit Protections
• Thermal Shutdown with Hysteresis
• Open-Drain VOUT Voltage Indicator (POK)
• Low Shutdown Quiescent Current ( < 30µA )
• Shutdown/Enable Control Function
• Simple TDFN3x3-10 Package with Exposed Pad
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
• Motherboards, VGA Cards
• Notebook PCs
• Add-in Cards
Pin Configuration
VOUT 1
VOUT 2
VOUT 3
FB 4
POK 5
GND
10 VCNTL
9 VIN
8 VIN
7 VIN
6 EN
The APL5620 is a 2A ultra low dropout linear regulator.
The IC needs two supply voltages, one is a control volt-
age (V_CNTL) for the control circuitry, the other is a main
supply Voltage(V_IN) for power conversion, to reduce power
dissipation and provide extremely low dropout voltage.
The APL5620 integrates many functions. A Power-On-Re-
set (POR) circuit monitors both supply voltages on V_CNTL
and V_IN pins to prevent erroneous operations. The func-
tions of thermal shutdown and current-limit protect the
device against thermal and current over-loads. A POK
indicates that the output voltage status with a delay time
set internally. It can control other converter for power
sequence. The APL5620 can be enabled by other power
systems. Pulling and holding the EN voltage below 0.4V
shuts off the output.
The APL5620 is available in a TDFN3x3-10 package
which features small size as TDFN3x3-10 and an Ex-
posed Pad to reduce the junction-to-case resistance to
extend power range of applications.
Simplified Application Circuit
V_CNTL
POK
EN
Enable
VCNTL
POK
VIN
VOUT
APL5620
EN
FB
GND
V_IN
V_OUT
Optional
TDFN3x3-10
(Top View)
= Exposed Pad
(connected to ground plane for better heat dissipation)
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
1
Rev. A.2 - Jun., 2009
www.anpec.com.tw