Product Summary

The MAX1686HEUA is a step-up DC-DC converter delivers up to 2W from a single Li-Ion or three NiMH cells. The device is ideal for burst-load applications such as GSM cell phones and wireless LANs, where the RF power amplifiers require short, high current bursts. The MAX1686HEUA reduces battery surge current by slowly charging a reservoir capacitor, which supplies the necessary peak energy for the load current burst. The applications of the MAX1686HEUA include GSM Phones, Wireless Handsets, PC Cards (PCMCIA).

Parametrics

MAX1686HEUA absolute maximum ratings: (1)IN, ON, LX1, CHG, LIM, FB, OUT, REF to GND: -0.3V to +7V; (2)LX2 to GND: -0.3V to +8V; (3)IN, LX1 Average Current: 1A; (4)Continuous Power Dissipation (TA = +70℃), TSSOP (derate 5.7mW/℃ above +70℃): 457mW; SO (derate 5.88mW/℃ above +70℃): 471mW; (5)Operating Temperature Range: -40℃ to +85℃; (6)Storage Temperature Range: -65℃ to +150℃; (7)Lead Temperature (soldering, 10sec): +300℃.

Features

MAX1686HEUA features: (1)Low 450mA Peak Battery Current Provides 2A, 5V GSM Burst; (2)90% Efficiency; (3)Internal Power MOSFETs and Current-Sense Resistor; (4)Output Disconnects from Input During Shutdown; (5)3μA Shutdown Current; (6)Precise Voltage-Controlled Current Limit (MAX1687); (7)Adaptive Constant-Recharge-Time Capability (MAX1688); (8)1.25V to 6V Adjustable Output; (9)2.7V to 6V Input Range (1 Li-Ion cell or 3 NiMH cells); (10)Switching Frequency Can Exceed 1MHz; (11)Standby Mode Disables DC-DC During Transmission Burst; (12)Low Inrush Current at Start-Up.

Diagrams

MAX1686HEUA block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
MAX1686HEUA
MAX1686HEUA

Maxim Integrated Products

Charge Pumps 3-5V Regulating Chrg Pump For SIM Cards

Data Sheet

Negotiable 
MAX1686HEUA+
MAX1686HEUA+

Maxim Integrated Products

Charge Pumps 3-5V Regulating Chrg Pump For SIM Cards

Data Sheet

0-1: $2.30
1-25: $1.54
25-50: $1.13
50-100: $1.10
MAX1686HEUA-T
MAX1686HEUA-T

Maxim Integrated Products

Charge Pumps 3-5V Regulating Chrg Pump For SIM Cards

Data Sheet

Negotiable 
MAX1686HEUA+T
MAX1686HEUA+T

Maxim Integrated Products

Charge Pumps 3-5V Regulating Chrg Pump For SIM Cards

Data Sheet

0-1970: $1.03
1970-2500: $1.03