Maxim > Products > Power and Battery Management > MAX8940

MAX8940

Low-Noise, High PSRR, Low-Dropout, 120mA Linear Regulator

Space-Saving, Low-Noise, High PSRR, Low-Dropout 120mA LDO

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX8940 low-noise, low-dropout (LDO) linear regulator 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_RMS and PSRR of 45dB at 100kHz.

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.

Data Sheet

Download	Rev 0	(PDF, 264kB)
E-Mail

Key Features

Space-Saving SC70
25µV_RMS Output Noise at 100Hz to 100kHz Bandwidth
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

Applications/Uses

Base Stations
Bluetooth Portable Radios and Accessories
Cellular and Cordless Phones
Digital Cameras
PDA and Palmtop Computers
Personal Stereos
Portable and Battery-Powered Equipment
Wireless LANs

Key Specifications:

Linear Regulators

Part Number

Regulators

V_IN
(V)

Preset V_OUT
(V)

V_DROPOUT @Rated I_LOAD
(V)

Rated I_LOAD
(mA)

I_CC
(µA)

Output Voltage Noise
(µV RMS)

Ref. Bypass

Low Batt./ Pwr. Fail Out

Reverse Batt. Protect.

Oper. Temp.
(°C)

Package/Pins

Smallest Available Pckg.
(mm²)

Budgetary Price

min

max

typ

max

typ

max w/pins

See Notes

MAX8940

2.8

0.12

120

Yes

-40 to +85

SC70/5

5.3

$0.37 @1k

See All Linear Regulators (149)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Typical Operating Circuit

More Information

Topmark Coding