19-1783; Rev 1; 11/03
200mA, Negative-Output, Low-Dropout
Linear Regulator in SOT23
General Description
Features
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 ( 1ꢀ% output voltage is preset or can ꢁe
adjusted from -1.25V to -5.5V with an external resistive
voltage-divider.
ꢀ Guaranteed 200mA Output Current
ꢀ Low 80mV Dropout Voltage at 200mA
ꢀ Low 85µA Quiescent Supply Current
ꢀ Low 1nA Current Shutdown Mode
ꢀ Stable with 1µF C
An internal N-channel MOSFET allows for a low 85µA
quiescent current virtually independent of the load,
making this device ideal for ꢁattery-powered portaꢁle
equipment, such as PDAs, moꢁile phones, cordless
phones, and wireless data modems.
OUT
ꢀ PSRR >60dB at 100Hz
ꢀ Thermal Overload Protection
ꢀ Short-Circuit Protection
The device is availaꢁle 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.
ꢀ -5.0V, -3.0V, or -2.5V Output Voltage
or Adjustable (-1.25V to -5.5V)
ꢀ Tiny SOT23-5 Package
Applications
Ordering Information
Disk Drives
PIN-
PACKAGE
PART
TEMP RANGE
Modems
MAX1735EUK50-T
MAX1735EUK30-T
MAX1735EUK25-T
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
5 SOT23-5
5 SOT23-5
5 SOT23-5
Instrumentation Amplifiers
Noteꢁook Computers
Moꢁile and Cordless Telephones
PCMCIA Cards
GaAsFET Bias
Output-Voltage Selector Guide
Moꢁile Wireless Data Modems
PDAs and Palmtop Computers
PRESET OUTPUT
VOLTAGE
SOT TOP
MARK
PART
MAX1735EUK50-T
MAX1735EUK30-T
MAX1735EUK25-T
-5.0V or adj
-3.0V or adj
-2.5V or adj
ADOZ
ADOY
ADOX
Typical Operating Circuit
Pin Configuration
-5V, -3V, OR -2.5V
TOP VIEW
-6.5V TO -2.5V
INPUT
OUTPUT
UP TO 200mA
IN
OUT
GND
1
2
3
5
4
OUT
SET
C
IN
C
OUT
MAX1735
MAX1735
IN
ON
SET
OFF
GND
SHDN
SHDN
ON
GND
SOT23-5
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.