MAX1735 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – 200mA, Negative-Output, Low-Dropout Linear Regulator in SOT23

19-1783; Rev 0; 7/00
200mA, Negative-Output, Low-Dropout
Linear Regulator in SOT23
General Description
The MAX1735 negative-output, low-dropout linear regu-
lator operates from a -2.5V to -6.5V input and delivers a
guaranteed 200mA with a low 80mV dropout. The high-
accuracy (±1%) output voltage is preset or can be
adjusted from -1.25V to -5.5V with an external resistive
voltage-divider.
An internal N-channel MOSFET allows for a low 85µA
quiescent current virtually independent of the load,
making this device ideal for battery-powered portable
equipment, such as PDAs, mobile phones, cordless
phones, and wireless data modems.
The device is available in several preset output voltage
versions: -5.0V, -3.0V, and -2.5V. All versions offer a
1nA low-power shutdown mode, short-circuit protec-
tion, and thermal overload protection. The device is
offered in a tiny 5-pin SOT23 package.
Applications
Disk Drives
Modems
Instrumentation Amplifiers
Notebook Computers
Mobile and Cordless Telephones
PCMCIA Cards
GaAsFET Bias
Mobile Wireless Data Modems
PDAs and Palmtop Computers
Features
o Guaranteed 200mA Output Current
o Low 80mV Dropout Voltage at 200mA
o Low 85µA Quiescent Supply Current
o Low 1nA Current Shutdown Mode
o Stable with 1µF C_OUT
o PSRR >60dB at 100Hz
o Thermal Overload Protection
o Short-Circuit Protection
o -5.0V, -3.0V, or -2.5V Output Voltage
or Adjustable (-1.25V to -5.5V)
o Tiny SOT23-5 Package
PART
MAX1735EUK50-T
MAX1735EUK30-T
MAX1735EUK25-T
Ordering Information
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
5 SOT23-5
5 SOT23-5
5 SOT23-5
Output-Voltage Selector Guide
PART
MAX1735EUK50-T
MAX1735EUK30-T
MAX1735EUK25-T
PRESET OUTPUT
VOLTAGE
-5.0V or adj
-3.0V or adj
-2.5V or adj
SOT TOP
MARK
ADOZ
ADOY
ADOX
Typical Operating Circuit
-6.5V TO -2.5V
INPUT
IN
C_IN
-5V, -3V, OR -2.5V
OUTPUT
UP TO 200mA
OUT
C_OUT
ON
GND
OFF
ON
MAX1735
SHDN
SET
GND
TOP VIEW
Pin Configuration
GND 1
5 OUT
MAX1735
IN 2
SHDN 3
4 SET
SOT23-5
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