Maxim > Products > Power and Battery Management > MAX1686, MAX1686H

MAX1686, MAX1686H

3V to 5V Regulating Charge Pumps for SIM Cards

1MHz Charge Is Ideal for Cellular Phones

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX1686 provides power for dual-voltage subscriber ID module (SIM) cards in portable applications such as GSM cellular phones. Designed to reside in the portable unit (cellular phone handset), the 1MHz charge pump converts a 2.7V to 4.2V input to regulated 5V output. The MAX1686H has a nominal output voltage of 5.0V, while the MAX1686 is set to 4.75V to reduce SIM card current drain. The charge pump has only 45µA quiescent supply current, which reduces to 3µA when a 3V-capable SIM card is being powered and the charge pump is disabled. An internal input/output shorting switch provides power for 3V SIM cards.

The MAX1686/MAX1686H require only three external capacitors around their space-saving, thin (1mm) 8-pin µMAX® packages.

Data Sheet

Download	Rev 1	(PDF, 168kB)
E-Mail

Key Features

2.7V to 4.2V Input Range
12mA min Charge-Pump Output Current
45µA Quiescent Supply Current
0.1µA Supply Current in Shutdown Mode
5.0V Regulated Charge-Pump Output (MAX1686H)
4.75V Regulated Charge-Pump Output (MAX1686)
Input-Output Shorting Switch for 3V Cards
Small External Components (Uses a 0.047µF, 0.1µF, and a 2.2µF Capacitor)
Output Driven to Ground in Shutdown Mode
Super-Small 8-Pin µMAX Package
Soft-Start and Short-Circuit Protection
Regulated charge pump for SIM cards nominal output voltage of 5.0V (MAX1686H)

Applications/Uses

GSM Cellular Phones
PCS Phones
Personal Communicators
Portable POS Terminals

Key Specifications:

Charge Pumps

Part Number

Topology

V_IN
(V)

I_CC
(mA)

Unadj. V_OUT
(V)

I_OUT
(A)

Oper. Freq.
(kHz)

Oper. Temp.
(°C)

Package/Pins

Smallest Available Pckg.
(mm²)

Budgetary Price

min

max

typ

max w/pins

See Notes

MAX1686

Doubler

Regulated

2.7

4.2

0.1

4.75

0.012

1000

-40 to +85

16.2

MAX1686H

See All Charge Pumps (45)

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

Didn't Find What You Need?

Next Day Product Selection Assistance from Applications Engineers
Parametric Search
Applications Help

Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Document Ref.: 19-1376 Rev 1; 1998-12-01
This page last modified: 2007-06-01