MAX8869 MAXIM [Maxim Integrated Products], MAX8869 Datasheet

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MAX8869

Manufacturer Part Number
MAX8869
Description
1A, Microcap, Low-Dropout, Linear Regulator Foldback Output Current Limit
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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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 (±1%) output voltage is preset at +5V, +3.3V,
+2.5V, +1.8V, or +1.0V or is adjustable from +0.8V to
+5V with an external resistor-divider.
The MAX8869 uses Microcap
requires only a small 1µF output capacitor for guaran-
teed stability. An internal PMOS pass transistor allows
low 500µA supply current, making this regulator useful
for networking and telecom hardware as well as bat-
tery-operated equipment. Other features include soft-
start, low-power shutdown, short-circuit protection, and
thermal shutdown protection.
The MAX8869 is available in a 1.5W, 16-pin TSSOP
package, which is 30% smaller than a SOT223 and only
1.1mm high.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
19-1692; Rev 1; 3/11
Microcap is a registered trademark of American Technical
Ceramics Corp.
________________________Applications
+2.7V TO +5.5V
V
Telecom Hardware
Network Equipment
Mobile Phone Base Stations
Personal Computers
Notebook Computers
IN
1μF
ON
OFF
Typical Operating Circuit
________________________________________________________________ Maxim Integrated Products
IN
IN
IN
IN
SHDN
SS
General Description
GND
OUT
OUT
OUT
OUT
RST
SET
®
technology and
MAX8869
OUTPUT
RESET
UP TO 1A
1μF
1A, Microcap, Low-Dropout,
V
OUT
o Guaranteed 1A Output Current
o Stable with C
o Low 200mV Dropout at 1A
o ±1% Output Voltage Accuracy
o 54dB PSRR at 100kHz
o Adjustable Soft-Start
o 3ms Reset Output
o Foldback Output Current Limit
o Thermal Overload Protection
o High-Power 16-Pin TSSOP Package (1.5W)
Note: All devices are specified over the -40°C to +85°C
temperature range.
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* Or adjustable from +0.8V to +5.0V. Contact factory for other
preset output voltages.
** EP = Exposed pad.
MAX8869EUE50+
MAX8869EUE33+
MAX8869EUE25+
MAX8869EUE18+
MAX8869EUE10+
TOP VIEW
Preset at +5V, +3.3V, +2.5V, +1.8V, or +1.0V
and Adjustable from +0.8V to +5.0V
30% Smaller than SOT223 (Only 1.1mm High)
PART
SHDN
Linear Regulator
N.C.
RST
SS
OUT
IN
IN
IN
IN
1
2
3
4
5
6
7
8
PIN-PACKAGE
16 TSSOP-EP**
16 TSSOP-EP**
16 TSSOP-EP**
16 TSSOP-EP**
16 TSSOP-EP**
= 1μF
Ordering Information
TSSOP-EP
MAX8869
Pin Configuration
16
15
14
13
12
11
10
9
N.C.
OUT
OUT
OUT
OUT
SET
GND
N.C.
Features
V
OUT
+5.0
+3.3
+2.5
+1.8
+1.0
(V)*
1

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MAX8869 Summary of contents

Page 1

... Other features include soft- start, low-power shutdown, short-circuit protection, and thermal shutdown protection. The MAX8869 is available in a 1.5W, 16-pin TSSOP package, which is 30% smaller than a SOT223 and only 1.1mm high. ________________________Applications Telecom Hardware ...

Page 2

Microcap, Low-Dropout, Linear Regulator ABSOLUTE MAXIMUM RATINGS IN, SHDN, RST GND ......................................-0.3V to +6V OUT, SET to GND ........................................-0. Output Short-Circuit Duration ........................................Indefinite Continuous Power Dissipation (T = +70°C) A 16-Pin TSSOP-EP (derate 26.1mW/°C above ...

Page 3

ELECTRICAL CHARACTERISTICS + 0.5V (whichever is greater), SHDN = IN open, SET = GND +2. OUT(NOM) unless otherwise noted.) (Note 3) PARAMETER SYMBOL Input Voltage Range Input Undervoltage Lockout Output Voltage Accuracy ...

Page 4

Microcap, Low-Dropout, Linear Regulator = +2.5V, SHDN = IN open +5V OUT OUTPUT VOLTAGE DEVIATION vs. OUTPUT CURRENT 0 -0 +5V IN -1.0 -1.5 -2 +3V IN -2.5 ...

Page 5

... Linear Regulator LOAD-TRANSIENT RESPONSE 5V I OUT 3.6V V OUT 10mV/div AC-COUPLED 20μs/div SHUTDOWN RESPONSE I = 100µA OUT V SHDN 100μV/div V OUT 40µs/div RESET OUTPUT RESPONSE MAX8869-17 5V/div 2V/div RST OUTPUT DELAY 2V/div 1ms/div MAX8869-12 1A 100mA 50mV/div AC-COUPLED MAX8869-15 5V/div 2V/div 5 ...

Page 6

... PNP-based regula- tors also waste considerable current in dropout when the pass transistor saturates and use high base-drive currents under large loads. The MAX8869 does not suf- fer from these problems and consumes only 500µA of quiescent current even in dropout. ...

Page 7

... OUTPUT rious conditions could cause the voltage at SET to exceed the 80mV Dual Mode threshold. A logic low on SHDN disables the MAX8869. In shut- down, the pass transistor, control circuitry, reference, and all biases are turned off, reducing supply current to typically 0.1µA. Connect SHDN to IN for normal opera- tion ...

Page 8

... Continuous short-circuit conditions will consequently result in a pulsed output. Thermal overload protection is designed to safeguard the MAX8869 in the event of fault conditions. For con- Current Limiting tinuous operation, do not exceed the absolute maxi- mum junction temperature rating of T Operating Region and Power Dissipation ...

Page 9

... Voltage vs. Output Current in Characteristics remains low in dropout. Noise, PSRR, and Transient Response The MAX8869 is designed to achieve low dropout volt- age and low quiescent current in battery-powered sys- tems while still maintaining good noise, transient ). Due to the OUT response, and AC rejection (see PSRR vs. Frequency in the Typical Operating Characteristics) ...

Page 10

Microcap, Low-Dropout, Linear Regulator Chip Information PROCESS: BiCMOS 10 ______________________________________________________________________________________ Package Information For the latest package outline information and land patterns (footprints www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status ...

Page 11

REVISION REVISION NUMBER DATE 0 8/00 Initial release Added lead-free versions to Ordering Information, updated Continuous 1 6/10 Power Dissipation and added Soldering Temperature to Absolute Maximum Ratings, and added EP row to Pin Description Maxim cannot assume responsibility for ...

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