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APW7176 Datasheet Preview

APW7176 Datasheet

1A Synchronous Step-Down Converter

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APW7176
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 APW7176 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 APW7176 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 APW7176 can
also run at 100% duty cycle for low dropout applications.
Pin Configuration
EN1 1
FB1 2
IN2 3
GND2 4
SW2 5
APW7176
TDFN3x3-10
(Top View)
10 SW1
9 GND1
8 IN1
7 FB2
6 EN2
Exposed pad
on backside
Ordering and Marking Information
APW7176
APW7176 QB:
APW
7176
XXXXX
Assembly Material
Handling Code
Temperature Range
Package Code
Package Code
QB : TDFN3x3-10
Temperature Range
I : -40 to 85 oC
Handling Code
TR : Tape & Reel
Assembly Material
G : Halogen and Lead Free Device
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.
Rev. A.1 - Mar., 2011
1
www.anpec.com.tw
Free Datasheet http://www.datasheetlist.com/




ANPEC

APW7176 Datasheet Preview

APW7176 Datasheet

1A Synchronous Step-Down Converter

No Preview Available !

APW7176
Absolute Maximum Ratings (Note 1)
Symbol
Parameter
Rating
Unit
VIN1/IN2
VFB1/FB2
VEN1/EN2
VSW1/SW2
Input Supply Voltage (IN1/IN2 to GND1/GND2)
Voltage on FB1 and FB2 (FB1/FB2 to GND1/GND2)
Voltage on EN1 and EN2 (EN1/EN2 to GND1/GND2)
Voltage on SW1 and SW2 (SW1/SW2 to GND1/GND2)
-0.3 ~ 6
-0.3 ~ VIN1/IN2+0.3
-0.3 ~ VIN1/IN2+0.3
-0.3 ~ VIN1/IN2+0.3
V
V
V
V
ISW_PEAK
PD
TJ
Peak SW Current
Maximum Power Dissipation (TA=25oC)
Maximum Junction Temperature
1.8 A
2W
150 °C
TSTG Storage Temperature Range
-65 ~ 150
°C
TSDR
Maximum Lead Soldering Temperature, 10 Seconds
260 °C
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Thermal Characteristics
Symbol
θJA
θJC
Parameter
Junction-to-Ambient Resistance in Free Air (Note 2)
Junction-to-Case Resistance in Free Air
TDFN3x3-10
TDFN3x3-10
Typical Value
50
12
Unit
°C/W
Note 2: θJA is measured on with the device mounted the PCB with top-layer pad of approximate 1” square of 1 oz copper.
Recommended Operating Conditions
Symbol
Parameter
VIN1/IN2
R2/R4
Input Supply Voltage (IN1/IN2 to GND1/GND2)
Feedback Resistance (Note 3)
IOUT Output Current
TA Operating Ambient Temperature
TJ Operating Junction Temperature
Note 3: Please refer to the typical application circuit.
Range
2.7 ~ 5.5
~ 300
0~1
-40 ~ 85
-40 ~ 125
Unit
V
k
A
°C
°C
Electrical Characteristics
The denotes the specifications that apply over VIN=3.6V and TA =25°C, unless otherwise specifications.
Symbol
Parameter
Test Conditions
APW7176
Min. Typ. Max.
VIN1/IN2
Each Converter Input Voltage Range
2.7 - 5.5
IFB1/FB2
FB1/FB2 Input Current
VFB1/FB2=0.6V
-30 - 30
VREF1/REF2 Each Converter Reference Voltage
IOUT=0mA~1A
0.588 0.6 0.612
VREF1/REF2
Each Converter Reference Voltage Line
Regulation
-40oCTA85 oC
- 0.04
IPK
Each Converter Peak Inductor Current
VIN1/IN2=3.3V, VFB=0.5V or
VOUT=90%, Duty cycle < 35%
1.4
1.6
-
-
Unit
V
nA
V
%/V
A
Copyright © ANPEC Electronics Corp.
Rev. A.1 - Mar., 2011
2
www.anpec.com.tw
Free Datasheet http://www.datasheetlist.com/


Part Number APW7176
Description 1A Synchronous Step-Down Converter
Maker ANPEC
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APW7176 Datasheet PDF






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