19-1654; Rev 1; 11/00
Low-Dropout, Low I , 1A Linear Regulator
Q
General Description
Features
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 ( 1ꢀ) 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.
ꢀ Guaranteed 1A Output Current
ꢀ Low 210mV Dropout at 1A
ꢀ Up to 1ꢀ Output Voꢁtaꢂe Aꢃꢃuraꢃc
Preset at 1.5V, 1.8V, 2.0V, 2.5V, 3.3V or 5.0V
Adjustabꢁe from 1.25V to 5.0V
ꢀ Reset Output (4ms deꢁac)
ꢀ Low 125µA Ground Current
ꢀ 0.1µA Shutdown
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 30ꢀ smaller than a SOT223 package and only
1.1mm high.
ꢀ Low 115µV
Output Noise
RMS
ꢀ Thermaꢁ Overꢁoad Proteꢃtion
ꢀ Output Current Limit
ꢀ Tinc TSSOP Power Paꢃkaꢂe (1.5W)
30ꢀ Smaꢁꢁer than SOT223 (onꢁc 1.1mm hiꢂh)
Ordering Information
TEMP.
RANGE
PIN-
PACKAGE
†
PART
V
OUT
(V)
________________________Applications
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
Notebook Computers
Cordless Telephones
Cellular Phones
Modems
Hand-Held Instruments
PDAs and Palmtop Computers
*EP = Exposed Pad
Contact factory for other preset output voltages.
†
Typical Operating Circuit
Pin Configuration
TOP VIEW
IN
OUT
OUT
OUT
OUT
RST
SET
NC
N.C.
IN
1
2
3
4
5
6
7
8
16 N.C.
15 OUT
14 OUT
13 OUT
12 OUT
11 SET
10 GND
IN
IN
OUT
OUT
MAX1793
IN
IN
C
C
IN
IN
MAX1793
IN
IN
ON
SHDN
RST
SHDN
N.C.
OFF
RESET
OUTPUT
9
N.C.
GND
TSSOP-EP
________________________________________________________________ Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.