MAX8940EXK28+T Maxim Integrated Products, MAX8940EXK28+T Datasheet

IC REG LDO 2.8V 120MA LN SC70-5

MAX8940EXK28+T

Manufacturer Part Number
MAX8940EXK28+T
Description
IC REG LDO 2.8V 120MA LN SC70-5
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX8940EXK28+T

Regulator Topology
Positive Fixed
Voltage - Output
2.8V
Voltage - Input
Up to 6V
Voltage - Dropout (typical)
0.135V @ 120mA
Number Of Regulators
1
Current - Output
120mA (Min)
Current - Limit (min)
130mA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
SC-70-5, SC-88A, SOT-323-5, SOT-353, 5-TSSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
MAX8940EXK28+T
MAX8940EXK28+TTR
The MAX8940 low-noise, low-dropout (LDO) linear reg-
ulator is designed to deliver up to 120mA continuous
output current. This regulator achieves a low 120mV
dropout for 120mA load current. The MAX8940 uses an
advanced architecture to achieve low output voltage
noise of 25µV
The MAX8940 is preset to either 2.8V or 3.0V. Designed
with a p-channel MOSFET series pass transistor, the
MAX8940 maintain very low ground current (40µA).
The regulator is designed and optimized to work with low-
value, low-cost ceramic capacitors. The MAX8940
requires only 1µF (typ) of output capacitance for stability
with any load. When disabled, current consumption drops
to below 1µA.
Package is a 5-pin SC70.
19-4662; Rev 0; 6/09
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.
Cellular and Cordless Phones
PDA and Palmtop Computers
Base Stations
Bluetooth Portable Radios and Accessories
Wireless LANs
Digital Cameras
Personal Stereos
Portable and Battery-Powered Equipment
TOP VIEW
RMS
SHDN
GND
IN
________________________________________________________________ Maxim Integrated Products
and PSRR of 45dB at 100kHz.
1
2
3
General Description
MAX8940
SC70
Pin Configuration
Low-Dropout, 120mA Linear Regulator
5
4
Applications
OUT
BP
♦ Space-Saving SC70
♦ 25µV
♦ 65dB PSRR at 10kHz
♦ 120mV Dropout at 120mA Load
♦ Stable with 1µF Ceramic Capacitor for Any Load
♦ Guaranteed 120mA Output
♦ Output Voltages: 2.8V or 3V
♦ Low 40µA Ground Current
♦ Excellent Load/Line Transient
♦ Overcurrent and Thermal Protection
* xy is the output voltage code (see Output Voltage Selector
Guide).
+ Denotes a lead(Pb)-free/RoHS-compliant package.
MAX8940EXKxy-T
MAX8940EXKxy+T
Low-Noise, High PSRR,
Bandwidth
ON
MAX8940EXK28-T
MAX8940EXK30-T
C
IN
PART*
= 1µF
Output Voltage Selector Guide
INPUT
2V TO 6V
RMS
OFF
PART
Output Noise at 100Hz to 100kHz
Typical Operating Circuit
IN
SHDN
MAX8940
Ordering Information
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
GND
V
OUT
OUT
BP
2.8
3
(V)
C
BP
C
= 10nF
OUT
= 1µF
PRESET OUTPUT
PIN-PACKAGE
5 SC70
5 SC70
2.8V OR 3.0V
Features
TOP MARK
AUD
AUE
1

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MAX8940EXK28+T Summary of contents

Page 1

... IN MAX8940 GND SHDN SC70 ________________________________________________________________ Maxim Integrated Products 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. Low-Noise, High PSRR, ♦ Space-Saving SC70 ♦ 25µV RMS Bandwidth ♦ 65dB PSRR at 10kHz ♦ 120mV Dropout at 120mA Load ♦ ...

Page 2

Low-Noise, High PSRR, Low-Dropout, 120mA Linear Regulator ABSOLUTE MAXIMUM RATINGS IN to GND .................................................................-0.3V to +7V Output Short-Circuit Duration ............................................Infinite OUT, SHDN to GND ......................................-0.3V to (IN + 0.3V) FB, BP, N.C. to GND..................................-0.3V to (OUT + 0.3V) Continuous Power ...

Page 3

Low-Dropout, 120mA Linear Regulator ELECTRICAL CHARACTERISTICS (continued 0.5V -40°C to +85°C, unless otherwise noted OUT A the MAX8940 is tested with 2.45V output, unless otherwise noted.) (Note 1) PARAMETER SYMBOL Output Noise ...

Page 4

Low-Noise, High PSRR, Low-Dropout, 120mA Linear Regulator ( 0.5V 1µ 1µ OUT IN OUT DROPOUT VOLTAGE vs. LOAD CURRENT 150 T = +85°C A 120 T = +25° ...

Page 5

Low-Dropout, 120mA Linear Regulator ( 0.5V 1µ 1µ OUT IN OUT OUTPUT NOISE vs. BP CAPACITANCE CAPACITANCE (nF) LINE TRANSIENT RESPONSE MAX8940 ...

Page 6

Low-Noise, High PSRR, Low-Dropout, 120mA Linear Regulator PIN NAME 1 IN Unregulated Input Supply 2 GND Ground SHDN 3 Shutdown. Pull low to disable the regulator. Noise Bypass for Low-Noise Operation. Connect a 10nF capacitor from BP to OUT. It ...

Page 7

Low-Dropout, 120mA Linear Regulator the temperature difference between the die junction and ambient, and the rate of airflow. The power dissi- pation across the device is OUT IN OUT The maximum power dissipation is: ...

Page 8

Low-Noise, High PSRR, Low-Dropout, 120mA Linear Regulator IN SHDN SHUTDOWN AND POWER-ON CONTROL GND 8 _______________________________________________________________________________________ ERROR MAX8940 AMP THERMAL SENSOR Functional Diagram MOS DRIVER P WITH I LIMIT OUT 1.225V REFERENCE AND NOISE BYPASS BP ...

Page 9

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 9 © 2009 Maxim Integrated Products ...

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