AIC1638 AIC [Analog Intergrations Corporation], AIC1638 Datasheet - Page 11

• Manufacturer Part Number: AIC1638
• Description: 3-PIN ONE-CELL STEP-UP DC/DC CONVERTER
• Manufacturer: AIC [Analog Intergrations Corporation]

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 BLOCK DIAGRAM

 PIN DESCRIPTIONS

 APPLICATION INFORMATION
ANALOG INTEGRATIONS CORPORATION
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
GENERAL DESCRIPTION
AIC1638 PFM (pulse frequency modulation) controller
ICs combine a switch mode regulator, N-channel
power MOSFET, precision voltage reference, and
voltage detector in a single monolithic device. They
offer both extreme low quiescent current, high
efficiency, and very low gate threshold voltage to
TYPICAL PERFORMANCE CHARACTERISTICS
PIN1 : GND
PIN2 : VOUT - IC supply pin. Connect VOUT to
Load Transient Response
(L=100 H, Co=47 F, V


- Ground. Must be low impedance;
sorder directly to ground plane.
the regulator output.
VOUT
GND
V
50mV/div
OUT
IN
1M
=2V)
1.25V REF.
+
-
Enable
Load Step
50mA/div
OSC, 100KHz


3-PIN ONE-CELL STEP-UP DC/DC CONVERTER
ensure start-up with low battery voltage ( 0.8V typ.).
Designed to maximize battery life in portable products,
and minimize switching losses by only switching as
needed service the load.
PFM controllers transfer a discrete amount of energy
per cycle and regulate the output voltage by
modulating switching frequency with the constant
Line Transient Response
PIN3 : SW – Internal drain of N-MOSFET switch.
www.analog.com.tw
TEL: [phone] FAX:[phone]
(CONTINUED)
SW
SPEC NO: DS-1638-00 03/01/00
V
0.5V/div
V
20mv/div
IN
OUT
AIC1638
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