Maxim > Products > Power and Battery Management > MAX8627

MAX8627

Low V_BATT, 20µA I_Q, 1MHz Synchronous Boost Converter with True Shutdown

Ideal for DSC Motors and Backup Power

Overview

Technical Documents

Ordering Info

Status

Part Number	Status
MAX8627	Active: In Production. But some versions of the family are Not Recommended for New Designs. See Ordering Information.

Description

The MAX8627 step-up converter is a high-efficiency, low-quiescent current, synchronous boost converter with True Shutdown™ and inrush current limiting. The MAX8627 generates any boosted output voltage from 3V to 5V from either a 2-cell NiMH/NiCd or a single-cell Li+/Li polymer battery.

Quiescent current is only 20µA (typ), and at light loads the converter pulses only as needed for best efficiency. At higher loads, PWM mode maintains fixed 1MHz operation for lowest noise and ripple.

The MAX8627 includes an internal soft-start to limit inrush current to a maximum of 500mA. Additional features include True Shutdown, internal compensation, and adjustable current limit. The MAX8627 is available in a tiny 3mm x 3mm TDFN package and is ideal for use in handheld devices such as DSCs, PDAs, and smartphones.

Data Sheet

Download	Rev 0	(PDF, 268kB)
E-Mail

Key Features

1MHz PWM Switching Frequency
True Shutdown Output
Up to 95% Efficiency
1.0A Guaranteed Output Current
Soft-Start Eliminates Inrush Current
20µA (typ) Quiescent Current
0.1µA Logic-Controlled Shutdown
Internal Synchronous Rectifier
Internal Compensation
Adjustable Current Limit
Low-Noise Antiringing Feature
Tiny 14-Pin, 3mm x 3mm, TDFN Package

Applications/Uses

Cell Phones, PDAs, MP3 Players
DSC Motors and Backup Power
Microprocessor/DSP Core Power
Portable Handheld Devices

Key Specifications:

Step-Up Switching Regulators

Part Number

V_IN
(V)

V_OUT
(V)

Max. I_OUT
(A)

Output Adjust. Method

DC-DC Outputs

Oper. Freq.
(kHz)

Package/Pins

Smallest Available Pckg.
(mm²)

Budgetary Price

min

max

min

max

≥

≤

max w/pins

See Notes

MAX8627

0.9

5.5

Resistor

1000

TDFN-EP/14

9.6

$1.28 @1k

See All Step-Up Switching Regulators (95)

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