Datasheet
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
♦ Guaranteed 200mA Output Current
♦ Low 80mV Dropout Voltage at 200mA
♦ Low 85µA Quiescent Supply Current
♦ Low 1nA Current Shutdown Mode
♦ Stable with 1µF C
OUT
♦ PSRR >60dB at 100Hz
♦ Thermal Overload Protection
♦ Short-Circuit Protection
♦ -5.0V, -3.0V, or -2.5V Output Voltage
or Adjustable (-1.25V to -5.5V)
♦ Tiny SOT23-5 Package
MAX1735
200mA, Negative-Output, Low-Dropout
Linear Regulator in SOT23
________________________________________________________________ Maxim Integrated Products 1
IN
SETSHDN
15OUTGND
MAX1735
SOT23-5
TOP VIEW
2
34
MAX1735
SHDN
-6.5V TO -2.5V
INPUT
-5V, -3V, OR -2.5V
OUTPUT
UP TO 200mA
C
IN
C
OUT
OUT
IN
SET
GND
GND
ON
OFF
ON
Typical Operating Circuit
19-1783; Rev 1; 11/03
Pin Configuration
Ordering Information
PART TEMP RANGE
PIN-
PACKAGE
MAX1735EUK50-T -40°C to +85°C 5 SOT23-5
MAX1735EUK30-T -40°C to +85°C 5 SOT23-5
MAX1735EUK25-T -40°C to +85°C 5 SOT23-5
Output-Voltage Selector Guide
PART
PRESET OUTPUT
VOLTAGE
SOT TOP
MARK
MAX1735EUK50-T -5.0V or adj ADOZ
MAX1735EUK30-T -3.0V or adj ADOY
MAX1735EUK25-T -2.5V or adj ADOX
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.