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APW7139 Datasheet Preview

APW7139 Datasheet

Step-Down Converter

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APW7139
Dual 1.3MHz, 800mA Synchronous Step-Down Converter
Features
General Description
800mA Output Current on Each Channel
2.5V to 5.5V Input Voltage Range
1.3MHz Constant Frequency Operation
Low Dropout Operation at 100% Duty Cycle
Synchronous Topology
0.6V Low Reference Voltage
Typical 0.1 µA Shutdown Current
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 APW7139 consists of two independent 1.3MHz 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 APW7139 is ideal for powering
portable equipment that runs from a single cell Lithium-
Ion (Li+) battery. Each converter can supply 800mA of load
current from a 2.5V to 5.5V input voltage. The output volt-
age can be regulated as low as 0.6V. The APW7139 can
also run at 100% duty cycle for low dropout applications.
Pin Configuration
EN1 1
FB1 2
IN2 3
GND2 4
SW2 5
APW7139
DFN3x3-10
(Top View)
10 SW1
9 GND1
8 IN1
7 FB2
6 EN2
Exposed pad
on backside
Ordering and Marking Information
APW7139
APW7139 QA:
APW
7139
XXXXX
Assembly Material
Handling Code
Temperature Range
Package Code
Package Code
QA : DFN3x3-10
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.
1
Rev. A.4 - Aug., 2010
www.anpec.com.tw




Anpec

APW7139 Datasheet Preview

APW7139 Datasheet

Step-Down Converter

No Preview Available !

APW7139
Absolute Maximum Ratings (Note 1)
Symbol
Parameter
Rating
Unit
VIN1/IN2
VFB1/FB2
VEN1/EN2
VSW1/SW2
ISW_PEAK
PD
TJ
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)
Peak SW Current
Maximum Power Dissipation (TA=25oC)
Maximum Junction Temperature
-0.3 ~ 6
V
-0.3 ~ VIN1/IN2+0.3
V
-0.3 ~ VIN1/IN2+0.3
V
-0.3 ~ VIN1/IN2+0.3
V
1.8
A
2
W
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
DFN3x3-10
DFN3x3-10
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
Unit
2.5 ~ 5.5
V
~ 500
k
0 ~ 800
mA
-40 ~ 85
°C
-40 ~ 125
°C
Electrical Characteristics
The denotes the specifications that apply over VIN=3.6V and TA = -40°C ~ 85°C, otherwise specifications are at TA=25°C.
Symbol
Parameter
Test Conditions
APW7139
Min. Typ. Max.
Unit
VIN1/IN2
IFB1/FB2
VFB1/FB2
Each Converter Input Voltage Range
FB1/FB2 Input Current
Each Converter Regulated Feedback
Voltage
VFB1/FB2=0.6V
IOUT=0mA~800mA
2.5
-
5.5
V
-30
-
30
nA
0.588 0.6 0.612
V
VFB1/FB2
Each Converter Reference Voltage Line
Regulation
-40oCTA85 oC
-
0.04 0.4
%/V
IPK
Each Converter Peak Inductor Current
VIN1/IN2=3.3V, VFB=0.5V or
VOUT=90%, Duty cycle < 35%
1.0
1.2
1.4
A
Copyright © ANPEC Electronics Corp.
2
Rev. A.4 - Aug., 2010
www.anpec.com.tw



Part Number APW7139
Description Step-Down Converter
Maker Anpec
Total Page 3 Pages
PDF Download

APW7139 Datasheet PDF





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