AIC1630A Datasheet, PDF (1/9 Pages) Analog Intergrations Corporation – HIGH-EFFICIENCY STEP-UP DC/DC CONVERTER CONTROLLER

AIC1630A
HIGH-EFFICIENCY STEP-UP DC/DC CONVERTER CONTROLLER
SPEC NO: DS-1630A-04
FEATURES
Default +5V Output Voltage.
Adjustable Output Voltage with Two Resistors.
Power-Saving Shutdown Mode (7µA typical).
120KHz Switching Rate.
On-Chip Low Battery Detector.
APPLICATIONS
Palmtop & Notebook Computers.
Battery Charger Supply.
Cellular Telephone.
LCD Contrast Supply.
Flash Memory Programmer.
Battery Backup Supplies.
Portable Instruments.
TYPICAL APPLICATION CIRCUIT
DESCRIPTION
The AIC1630A is a DC-DC converter designed to
drive an external power switch for more flexibility,
especially in higher voltage and larger power
applications. Typically six components are required
to set up a step up configuration easily achieving
efficiency beyond 80%. A few more components
are required to set up a step down configuration
delivering 4A load current with 83% typical
efficiency, 86% at 2A load, and 300µA quiescent
current.
The output voltage can be internally set to 5V or
externally set to an arbitrary value below
breakdown voltage of the power switch. Logic-
controlled shutdown mode is provided for power
saving. The low battery detector can be also
configured as a linear regulator.
120KHz switching rate reduces the inductor size.
Inductors of 25µH to 50µH inductance are
recommended for most applications.
+V_OUT
LOAD
+V_IN
L
D1
1N5819
100Ω
R3
+
C1
5nF C2
Q1
1
270Ω
R4
SD
VOUT
VIN
R1
LBI
EXT
GND
LBO
EXT
R2
FB
AIC1630A ^INT
Note : V_IN ≥ 1.8V , V_OUT ≤ 7V
High Efficiency Step-Up DC/DC Converter
ORDERING INFORMATION
AIC1630A XX
PACKAGE TYPE
N: PLASTIC DIP
S: SMALL OUTLINE
TEMPERATURE RANGE
C=0°C~70°C
ORDER NUMBER
AIC1630ACN
(PLASTIC DIP)
AIC1630ACS
(PLASTIC SO)
PIN CONFIGURATION
TOP VIEW
SD ₁
VIN 2
EXT 3
GND ₄
8 ^VOUT
7 LBI
6 LBO
5 ^FB
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: [phone] FAX:[phone]
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