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MAX8877, MAX8878

Low-Noise, Low-Dropout, 150mA Linear Regulators with '2982 Pinout

SOT23 Regulator Saves Space

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX8877/MAX8878 low-noise, low-dropout linear regulators operate from a 2.5V to 6.5V input and deliver up to 150mA. These devices are pin-compatible with the industry-standard '2982 and offer an improved dropout voltage. Typical output noise is 30µV_RMS, and typical dropout is only 165mV at 150mA. The output voltage is preset to voltages in the range of 1.5V to 5.0V, in 100mV increments.

Designed with an internal P-channel MOSFET pass transistor, the MAX8877/MAX8878 maintain a low 100µA supply current, independent of the load current and dropout voltage. Other features include a 10nA logic-controlled shutdown mode, short-circuit and thermal-shutdown protection, and reverse battery protection. The MAX8878 also includes an auto-discharge function, which actively discharges the output voltage to ground when the device is placed in shutdown. Both devices come in regular and thin 5-pin SOT23 package.

Data Sheet

Download	Rev 2	(PDF, 400kB)
E-Mail

Key Features

Pin-Compatible with the Industry-Standard '2982
Low Output Noise: 30µV_RMS
Low 55mV Dropout at 50mA Output (165mV at 150mA output)
Low 85µA No-Load Supply Current
Low 100µA Operating Supply Current (even in dropout)
Thermal-Overload and Short-Circuit Protection
Reverse Battery Protection
Output Current Limit
Preset Output Voltages (±1.4% Accuracy)
10nA Logic-Controlled Shutdown

Applications/Uses

Audio Systems
Cordless Phones
Electronic Planners
Handheld Instruments (PDAs, Palmtops)
Modems
Palmtop Computers
PCMCIA Cards
PCS Telephones

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

Watchdog

Reverse Batt. Protect.

Oper. Temp.
(°C)

Package/Pins

Smallest Available Pckg.
(mm²)

Budgetary Price

min

max

typ

max

typ

max w/pins

See Notes

MAX8877

2.5

6.5

1.5
1.8
2.5
2.8
2.84
3
3.15
3.3
3.6
5

0.16

150

180

Yes

-40 to +85

8.3

MAX8878

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

Notes and Comments

Low-Noise, Low-Dropout, Reverse Battery Protection

More Information

Topmark Coding	MAX8877
Topmark Coding	MAX8878

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Document Ref.: 19-1301 Rev 2; 2001-01-01
This page last modified: 2007-06-01