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APW7179C Datasheet Preview

APW7179C Datasheet

1A Synchronous Step-Down Converter

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APW7179C
Dual 1.5MHz, 1A Synchronous Step-Down Converter
Features
General Description
1A Output Current on Each Channel
3V 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
High Efficiency
Internally Compensated
Lead Free and Green Devices Available
(RoHS Compliant)
Applications
TV Tuner/Box
Portable Instrument
The APW7179C 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 APW7179C is ideal for power-
ing portable equipment that runs from a single cell
Lithium-Ion (Li+) battery. Each converter can supply 1A of
load current from a 3V to 5.5V input voltage. The output
voltage can be regulated as low as 0.6V. The APW7179C
can also run at 100% duty cycle for low dropout
applications.
Pin Configuration
APW7179C
IN2 1
SW2 2
GND1 3
FB1 4
NC 5
EN1 6
TDFN3x3-12
(Top View)
12 EN2
11 NC
10 FB2
9 GND2
8 SW1
7 IN1
Exposed pad
on backside
Ordering and Marking Information
APW7179C
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
APW7179C QB:
APW
7179C
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 Greento 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.3 - Apr., 2017
www.anpec.com.tw




ANPEC

APW7179C Datasheet Preview

APW7179C Datasheet

1A Synchronous Step-Down Converter

No Preview Available !

APW7179C
Absolute Maximum Ratings (Note 1)
Sym bol
P arame ter
Ra ting
Unit
VI N1/ I N2
V FB1/FB2
V EN1/EN2
In put S upply Voltage (IN1/IN2 to GND1/GND2)
Voltag e o n FB1 a nd FB2 (FB1 /FB2 to GND 1/GND2 )
Voltag e o n EN1 an d EN2 (EN1/EN2 to GND1/GND2)
-0.3 ~ 6
V
-0 .3 ~ V IN 1/IN2 +0.3
V
-0 .3 ~ V IN 1/IN2 +0.3
V
V SW1/SW2 SW1/SW2 to G ND1/GND2 Voltage
>20 ns
-0 .3 ~ V IN 1/IN2 +0.3
V
<20 ns
-5 ~ 9
V
I SW _PEAK
PD
TJ
TSTG
TSDR
Peak SW Current
Ma ximu m P owe r Dissipation (TA=25 oC)
Maximum Junctio n Temp erature
Storage Tempe rature Range
Ma ximu m Le ad Sold ering Tempera tur e, 10 Se conds
2.5
A
2
W
1 50
°C
-6 5 ~ 150
°C
2 60
°C
Note1: Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are
stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under "recom-
mended operating conditions" is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device
reliability.
Thermal Characteristics
Sym bol
P arame ter
Typical V alue
Unit
θJA
Ju nctio n-to-Ambie nt Resista nce in Free Air (Note 2)
TDFN3x3-12
50
θJC
Ju nctio n-to-Case Resistance in Fre e Air
TDFN3x3-12
12
°C/W
Note 2: θJA is measured on with the device mounted the PCB with top-layer pad of approximate 1square of 1 oz copper.
Recommended Operating Conditions
Sym bol
VI N1/ I N2
IOUT
TA
TJ
P arame ter
In put Supply Voltage (IN1/IN2 to GND1/GND2)
Output Current
Oper ati ng Ambien t Temperatur e
Oper ati ng Junction Temp erature
Range
3 ~ 5.5
0~ 1
-4 0 ~ 85
-4 0 ~ 125
Unit
V
A
°C
°C
Note 3: Please refer to the typical application circuit.
Electrical Characteristics
The denotes the specifications that apply over VIN=3.6V and TA =25°C, unless otherwise specifications.
S ym bol
Param eter
Test Conditions
APW717 9C
Min. Typ. Max.
VIN1 /IN2
IFB1 /FB2
Each Co nve rte r Inp ut V olta ge Range
FB1 /FB2 Inpu t Curren t
V FB1/FB2= 0.6 V
3
-
5.5
-30
-
30
VREF1/REF2 E ach Co nve rte r Re fer ence Voltage
0.588 0 .6 0 .6 12
I PK
Each Co nve rte r Peak In ductor Cu rrent
V IN 1/IN2=3.3V , VFB=0.5V o r
V OUT=90%, Duty cycle < 35 %
1.3
2
-
Unit
V
nA
V
A
Copyright © ANPEC Electronics Corp.
2
Rev. A.32- Apr., 2017
www.anpec.com.tw



Part Number APW7179C
Description 1A Synchronous Step-Down Converter
Maker ANPEC
Total Page 3 Pages
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APW7179C Datasheet PDF





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