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.
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
Features
MAX1735
Applications
Disk Drives
Modems
Instrumentation Amplifiers
Notebook Computers
Mobile and Cordless Telephones
PCMCIA Cards
GaAsFET Bias
Mobile Wireless Data Modems
PDAs and Palmtop Computers
PART
MAX1735EUK50-T
MAX1735EUK30-T
MAX1735EUK25-T
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
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
MAX1735
ON
GND
OFF
ON
SHDN
GND
SET
SHDN
3
OUT
C
OUT
-5V, -3V, OR -2.5V
OUTPUT
UP TO 200mA
Pin Configuration
TOP VIEW
GND
1
5
OUT
IN
2
MAX1735
4
SET
SOT23-5
________________________________________________________________
Maxim Integrated Products
1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
