APW7179 Datasheet, PDF (1/16 Pages) Anpec Electronics Coropration – Dual 1.5MHz, 1A Synchronous Step-Down Converter

APW7179
Dual 1.5MHz, 1A Synchronous Step-Down Converter
Features
General Description
• 1A Output Current on Each Channel
• 2.7V to 5.5V Input Voltage Range
• 1.5MHz Constant Frequency Operation
• Low Dropout Operation at 100% Duty Cycle
• Synchronous Topology
• 0.6V Low Reference Voltage
• Current Mode Operation
• Over-Temperature Protection
• Over-Current Protection
• Up to 94% Efficiency
• Internally Compensated
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
• TV Tuner/Box
• Portable Instrument
The APW7179 consists of two independent 1.5MHz con-
stant frequency, current mode, and PWM step-down
converters. Each converter integrates a main switch with
a synchronous rectifier for high efficiency without an ex-
ternal Schottky diode. The APW7179 is ideal for powering
portable equipment that runs from a single cell Lithium-
Ion (Li+) battery. Each converter can supply 1A of load
current from a 2.7V to 5.5V input voltage. The output volt-
age can be regulated as low as 0.6V. The APW7179 can
also run at 100% duty cycle for low dropout applications.
Pin Configuration
IN2 ¹
SW2 2
GND2 3
FB1 ⁴
NC 5
EN1 6
APW7179
TDFN3x3-12
(Top View)
12 EN2
11 NC
10 FB2
9 GND1
8 SW1
7 IN1
Exposed pad
on backside
Ordering and Marking Information
APW7179
Assembly Material
Handling Code
Temperature Range
Package Code
Package Code
QB : TDFN3x3-12
Temperature Range
I : -40 to 85 ^oC
Handling Code
TR : Tape & Reel
Assembly Material
G : Halogen and Lead Free Device
APW7179 QB:
APW
7179
XXXXX
XXXXX - Date Code
Note: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte tin plate termination finish; which
are fully compliant with RoHS. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J-STD-020D for
MSL classification at lead-free peak reflow temperature. ANPEC defines “Green” to mean lead-free (RoHS compliant) and halogen
free (Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by
weight).
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.1 - Mar., 2011
www.anpec.com.tw