AIC1596 Ver la hoja de datos (PDF) - Analog Intergrations
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AIC1596 Datasheet PDF : 5 Pages
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AIC1596
3A STEP-DOWN PWM REGULATOR
SPEC NO: DS-1596-P1 03/23/00
ELECTRICAL CHARACTERISTICS (TJ=25°C, VIN=18V)
PARAMETER
TEST CONDITIONS
MIN. TYP. MAX. UNIT
Input Voltage
4.5
36
V
Fixed Output Voltage
Feedback Voltage
AIC1596-25 (VIN > 4.5V)
AIC1596-33 (VIN > 4.5V)
AIC1596-50 (VIN > 7.0V )
AIC1596-12 (VIN > 15V )
AIC1596 Adjustable
2.5
V
3.3
V
5.0
V
12.0
V
1.25
V
Output Voltage Regulation
4
%
Quiescent Current
Internal switch off
1
5
mA
Shutdown Quiescent Current SHDN = 5V (OFF)
80
µA
Logic Input High
(Regulator OFF)
2
V
Logic Input Low
(Regulator ON )
0.8
V
Oscillator Frequency
AIC1596A series
150
Oscillator Frequency
AIC1596B series
300
KHz
Output Current Limit
3.0
A
Over Voltage Protection
120
%
Maximum Duty Cycle
100
%
Efficiency
Vo=5V , Io=3A
90
%
! PIN DESCRIPTIONS
PIN 1: IN
Supply voltage input for the IC
switching regulator. A suitable input
bypass capacitor must be present at
this pin to minimize voltage transients
and to supply the switching currents
needed by the regulator.
PIN 2:OUT Internal switch. The voltage at this pin
switches between (VIN-VSAT) and ap-
proximately –0.5V, with a duty cycle of
approximately VOUT/VIN.
PIN 3: GND Ground requires a short, low noise
connection to ensure good load
regulation.
PIN 4: FB Feedback input for fixed-output or
adjustable-output version. Connect di-
rectly to output for fixed operation
version or to a resistor divider for ad-
justable operation versions.
PIN 5: SHDN Allows the switching regulator circuit
to be shutdown using logic level sig-
nals thus dropping the total input sup-
ply current to approximately 80µA.
Drive it high to disable the reference,
control circuitry and internal switches.
Drive low or connect to GND for nor-
mal operation.
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510
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