MAX1735(2000) Ver la hoja de datos (PDF) - Maxim Integrated
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MAX1735 Datasheet PDF : 10 Pages
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200mA, Negative-Output, Low-Dropout
Linear Regulator in SOT23
Typical Operating Characteristics (continued)
(Circuit of Figure 2, VIN = -4.0V, VOUT = -3.0V, TA = +25°C, unless otherwise specified.)
SHUTDOWN RESPONSE
(DRIVEN FROM A POSITIVE VOLTAGE)
MAX1735 toc14a
SHUTDOWN RESPONSE
(DRIVEN BY A NEGATIVE VOLTAGE)
MAX1735 toc14b
SHUTDOWN-PIN BIAS CURRENT
vs. SHUTDOWN-PIN VOLTAGE
2.0
VSHDN
2V/div
0
1.5
0
VSHDN
2V/div
1.0
0
VOUT
2V/div
0
0.5
VOUT
2V/div
0
TIME (200µs/div)
TIME (200µs/div)
-0.5
-6.5 -5.0 -3.5 -2.0 -0.5 1.0 2.5 4.0 5.5
SHUTDOWN-PIN VOLTAGE (V)
Pin Description
PIN
NAME
FUNCTION
1
GND
Ground
Regulator Input. Supply voltage can range from -2.5V to -6.5V. Bypass with a 1µF capacitor to GND
2
IN
(see Capacitor Selection and Regulator Stability). This pin also functions as a heatsink. Solder to a
large PC board pad or directly to the PC board power plane to maximize thermal dissipation.
Shutdown Input. Drive SHDN to GND to turn the regulator off, reducing the input current to less than
3
SHDN
1nA. Drive SHDN above +1.6V or below -1.6V to enable the regulator. Connect SHDN to IN for
always-on operation.
Dual Mode™ Regulator Feedback Input. Connect SET to GND for the preset output voltage. Use a
4
SET
resistive voltage-divider from OUT to SET to set the output voltage between -1.25V and -5.5V.
Regulation setpoint is -1.25V.
5
OUT
Regulator Output. OUT supplies up to 200mA in regulation. Bypass to GND with a 1µF ceramic
capacitor.
Dual Mode is a trademark of Maxim Integrated Products.
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