19-1692; Rev 0; 8/00
1A, MicroCap, Low-Dropout,
Linear Regulator
General Description
Features
The MAX8869 low-dropout linear regulator operates
from a +2.7V to +5.5V input and delivers a guaranteed
1A load current with a low 200mV dropout. The high-
accuracy ( 1ꢀ% output voltage is preset at +5Vꢁ +ꢂ.ꢂVꢁ
+2.5Vꢁ +1.8Vꢁ or +1.0V or is adjustable from +0.8V to
+5V with an external resistor-divider.
o Guaranteed 1A Output Current
o Stable with C = 1µF
OUT
o Low 200mV Dropout at 1A
o
1ꢀ Output Voltaꢁe Aꢂꢂuraꢂc
Preset at +5V, +3.3V, +2.5V, +1.8V, or +1.0V
and Adjustable from +0.8V to +5.0V
The MAX8869 uses MicroCap™ technology and
requires only a small 1µF output capacitor for guaran-
teed stability. An internal PMOS pass transistor allows
low 500µA supply currentꢁ making this regulator useful
for networking and telecom hardware as well as bat-
tery-operated equipment. Other features include soft-
startꢁ low-power shutdownꢁ short-circuit protectionꢁ and
thermal shutdown protection.
o 54dB PSRR at 100kHz
o Adjustable Soft-Start
o 3ms Reset Output
o Foldbaꢂk Output Current Limit
o Thermal Overload Proteꢂtion
The MAX8869 is available in a 1.5Wꢁ 16-pin TSSOP
packageꢁ which is ꢂ0ꢀ smaller than a SOT22ꢂ and only
1.1mm high.
o Hiꢁh-Power 16-Pin TSSOP Paꢂkaꢁe (1.5W)
30ꢀ Smaller than SOT223 (onlc 1.1mm hiꢁh)
Ordering Information
________________________Applications
TEMP.
PIN-
V
OUT
(V)
*
PART
Telecom Hardware
RANGE
PACKAGE
Network Equipment
MAX8869EUE50 -40°C to +85°C
MAX8869EUE33 -40°C to +85°C
MAX8869EUE25 -40°C to +85°C
MAX8869EUE18 -40°C to +85°C
MAX8869EUE10 -40°C to +85°C
16 TSSOP-EP** +5.0
Mobile Phone Base Stations
Personal Computers
Notebook Computers
16 TSSOP-EP
16 TSSOP-EP
16 TSSOP-EP
16 TSSOP-EP
+3.3
+2.5
+1.8
+1.0
*Or adjustable from +0.8V to +5.0V. Contact factory for other
preset output voltages.
**EP = Exposed pad.
MicroCap is a trademark of Maxim Integrated Products.
Typical Operating Circuit
MAX8869
Pin Configuration
TOP VIEW
N.C.
IN
1
2
3
4
5
6
7
8
16 N.C.
15 OUT
14 OUT
IN
IN
IN
IN
OUT
OUT
OUT
OUT
RST
IN
IN
OUT
+2.7V TO +5.5V
MAX8869
UP TO 1A
IN
13 OUT
12 OUT
11 SET
10 GND
1µF
IN
1µF
RST
SHDN
SS
ON
RESET
OUTPUT
SHDN
SS
OFF
SET
9
N.C.
GND
TSSOP-EP
________________________________________________________________ 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.