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ANPEC

APW7178A Datasheet Preview

APW7178A Datasheet

1A Synchronous Buck Regulator

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APW7178A
1.5MHz, 1A Synchronous Buck Regulator
Features
1A Output Current
Wide 2.7V~6.0V Input Voltage
Fixed 1.5MHz Switching Frequency
Low Dropout Operating at 100% Duty Cycle
Synchronous Rectifier
0.6V Reference Voltage
<0.5µA Input Current During Shutdown
Short-Circuit Protection
Over-Temperature Protection
Available in TDFN2x2-6 Packages
Lead Free and Green Devices Available
(RoHS Compliant)
Applications
HD STB
BT Mouse
PND Instrument
Portable Instrument
Pin Configuration
General Description
APW7178A is a 1.5MHz high efficiency monolithic syn-
chronous buck regulator. Design with current mode
scheme, the APW7178A is stable with ceramic output
capacitor. Input voltage from 2.7V to 6.0V makes the
APW7178A ideally suited for single Li-Ion battery pow-
ered applications. 100% duty cycle provides low dropout
operation, extending battery life in portable electrical
devices. The internally fixed 1.5MHz operating frequency
allows the using of small surface mount inductors and
capacitors. The synchronous switches included inside
increase the efficiency and eliminate the need of an ex-
ternal Schottky diode.
The APW7178A is available in TDFN2x2-6 packages.
Simplified Application Circuit
VIN IIN
C1
4.7µF
(MLCC)
APW7178A
VIN SW
NC
RUN FB
GND
L1
2.2µH
VOUT
C2
R1
C3
10µF
(MLCC)
R2
R1 1Mis recommended
R2 200Kis recommended
Place C1 closed VIN/GND. Without via hole is recommended.
APW7178A
NC 1
RUN 2
VIN 3
6 FB
5 GND
4 SW
TDFN2x2-6
(Top View)
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 - Sep., 2012
www.anpec.com.tw




ANPEC

APW7178A Datasheet Preview

APW7178A Datasheet

1A Synchronous Buck Regulator

No Preview Available !

APW7178A
Ordering and Marking Information
APW7178A
Assembly Material
Handling Code
Temperature Range
Package Code
Package Code
QB: TDFN2x2-6
Operating Ambient Temperature Range
I : -40 to 85 oC
Handling Code
TR : Tape & Reel
Assembly Material
G : Halogen and Lead Free Device
APW7178AQB :
78A
X - Date Code
X
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).
Absolute Maximum Ratings (Note 1)
Symbol
Parameter
Rating
Unit
VIN
Input Bias Supply Voltage (VIN to GND)
-0.3 ~ 7
V
RUN, FB, SW to GND Voltage
-0.3 ~ VIN+0.3
V
PD
Power Dissipation
Internally Limited
W
Maximum Junction Temperature
150
oC
TSTG
Storage Temperature
-65 ~ 150
oC
TSDR
Maximum Lead Soldering Temperature, 10 Seconds
260
oC
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
Symbol
θJA
Parameter
Junction-to-Ambient Resistance in Free Air (Note 2)
TDFN2x2-6
Typical Value
165
Unit
oC/W
Note 2: θJA is measured with the component mounted on a high effective thermal conductivity test board in free air.
Recommended Operating Conditions (Note 3)
Symbol
Parameter
VIN
Input Bias Supply Voltage (VIN to GND)
VOUT
Converter Output Voltage
IOUT
Converter Output Current
L1
Converter Output Inductor
Range
Unit
2.7 ~ 6
V
0.6 ~ VIN
V
0~1
A
1.0 ~ 10
µH
Copyright © ANPEC Electronics Corp.
2
Rev. A.1 - Sep., 2012
www.anpec.com.tw



Part Number APW7178A
Description 1A Synchronous Buck Regulator
Maker ANPEC
Total Page 3 Pages
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