APW7153 Datasheet, PDF (1/20 Pages) Anpec Electronics Coropration – 3A 5V 2MHz Synchronous Buck Converter

APW7153/A/B
3A 5V 2MHz Synchronous Buck Converter
Features
• High Efficiency up to 95%
- PFM/PWM Mode Operation
• Adjustable Output Voltage from 0.8V to VIN
• Integrated 110mΩ High/Low Side MOSFET
• Programmable Switching Frequency: 300kHz to
2MHz
• Low Dropout Operation: 100% Duty Cycle
• Stable with Low ESR Capacitors
• Power-On-Reset Detection on VDD and PVDD
• Integrate Soft-Start and Soft-Off
• Over-Temperature Protection
• Over-Voltage Protection
• Under-Voltage Protection
• High/Low Side Current-Limit
• Power Good Indicator (APW7153A/B)
• Enable/Shutdown Function
• Small TDFN3x3-10 and SOP-8P Packages
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
General Description
APW7153/A/B is a 3A synchronous buck converter with
integrated 110mΩ power MOSFETs. The APW7153/A/B
is designed with a current-mode control scheme; it can
convert wide input voltage of 2.6V to 5.5V to the output
voltage adjustable from 0.8V to 5.5V to provide excellent
output voltage regulation.
The APW7153/A/B is equipped with an PFM/PWM mode
operation. At light load, the IC operates in the PFM mode
to reduce the switching losses. At heavy load, the IC works
in PWM. At PWM mode, the switching frequency is set by
the external resistor.
The APW7153/A/B is also equipped with Power-on-reset,
soft-start, soft-stop, and whole protections (under-voltage,
over-voltage, over-temperature and current-limit) into a
single package.
This device, available TDFN3x3-10 and SOP-8P provides
a very compact system solution external components and
PCB area.
Simplified Application Circuit
V_IN
• LCD Minitor/TV
• Set-Top Box
• DSL, Switch HUB
• Notebook Computer
• Portable Instrument
V_DD P_VDD
APW7153/A/B
V_OUT
Pin Configuration
APW7153
APW7153
SHDN/RT 1
GND 2
LX 3
PGND 4
9
Expose
Pad
8 COMP ^{SHDN/RT 1}
7 FB
6 VDD
GND 2
LX 3
LX 4
5 PVDD _{PGND 5}
11
Expose
Pad
10 COMP
9 FB
8 VDD
7 PVDD
6 PVDD
SOP-8P
(Top View)
TDFN3X3-10
(Top View)
APW7153A
APW7153B
EN/RT 1
GND 2
LX 3
LX 4
PGND 5
11
Expose
Pad
10 COMP
9 FB
8 POK
7 VDD
6 PVDD
SHDN/RT 1
GND 2
LX 3
LX 4
PGND 5
11
Expose
Pad
10 COMP
9 FB
8 POK
7 VDD
6 PVDD
TDFN3X3-10
(Top View)
TDFN3X3-10
(Top View)
9 The pin 2 and 4 must be connected to the pin 9 (Exposed Pad)
11 The pin 2 and 5 must be connected to the pin 11 (Exposed Pad)
ANPEC reserves the right to make changes to improve reliability or manufacturSability 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.6 - Aug., 2012
www.anpec.com.tw