MAX1793 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – Low-Dropout, Low IQ, 1A Linear Regulator

19-1654; Rev 1; 11/00
Low-Dropout, Low I_Q, 1A Linear Regulator
General Description
The MAX1793 low-dropout linear regulator (LDO) oper-
ates from +2.5V to +5.5V and delivers a guaranteed 1A
load current with a low 210mV dropout. The high-accu-
racy (±1%) output voltage is preset at an internally
trimmed voltage (see Ordering Information) or can be
adjusted from 1.25V to 5.0V with an external resistor-
divider.
An internal PMOS pass transistor allows a low 125µA
supply current, making the MAX1793 ideal for battery-
operated portable equipment. Other features include a
built-in reset output, low-power shutdown, and short-cir-
cuit and thermal overload protection. The MAX1793 is
available in a 1.5W, 16-pin power TSSOP package,
which is 30% smaller than a SOT223 package and only
1.1mm high.
________________________Applications
Notebook Computers
Cordless Telephones
Cellular Phones
Modems
Hand-Held Instruments
PDAs and Palmtop Computers
Features
o Guaranteed 1A Output Current
o Low 210mV Dropout at 1A
o Up to ±1% Output Voltage Accuracy
Preset at 1.5V, 1.8V, 2.0V, 2.5V, 3.3V or 5.0V
Adjustable from 1.25V to 5.0V
o Reset Output (4ms delay)
o Low 125µA Ground Current
o 0.1µA Shutdown
o Low 115µV_RMS Output Noise
o Thermal Overload Protection
o Output Current Limit
o Tiny TSSOP Power Package (1.5W)
30% Smaller than SOT223 (only 1.1mm high)
Ordering Information
PART
TEMP.
RANGE
PIN-
PACKAGE
V_OUT (V)^†
MAX1793EUE-50 -40°C to +85°C 16 TSSOP-EP* 5.0 or Adj
MAX1793EUE-33 -40°C to +85°C 16 TSSOP-EP* 3.3 or Adj
MAX1793EUE-25 -40°C to +85°C 16 TSSOP-EP 2.5 or Adj
MAX1793EUE-20 -40°C to +85°C 16 TSSOP-EP 2.0 or Adj
MAX1793EUE-18 -40°C to +85°C 16 TSSOP-EP 1.8 or Adj
MAX1793EUE-15 -40°C to +85°C 16 TSSOP-EP 1.5 or Adj
*EP = Exposed Pad
† _{Contact factory for other preset output voltages.}
Typical Operating Circuit
IN
C_IN
ON
OFF
NINC
OUT
IN _MAX1793 OUT
IN
OUT
IN
OUT
SHDN
RST
SET
GND
OUT
C_OUT
RESET
OUTPUT
Pin Configuration
TOP VIEW
N.C. 1
IN 2
IN 3
IN 4
IN 5
RST 6
SHDN 7
N.C. 8
MAX1793
16 N.C.
15 OUT
14 OUT
13 OUT
12 OUT
11 SET
10 GND
9 N.C.
TSSOP-EP
________________________________________________________________ Maxim Integrated Products 1
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