The MAX1686HEUA+ is a 3V to 5V regulating charge pump for SIM cards in 8 pin μMAX package. It 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 5V 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 MAX1686H require only three external capacitors around the space-saving, thin (1mm) 8-pin μMAX package. Typical applications include GSM cellular phones, PCS phones, portable POS terminals and personal communicators.
Supply voltage range is 2.7V to 4.2V
Operating temperature range from -40°C to 85°C
Charge pump output current is 12mA min
Supply current in shutdown mode is 0.1μA
Regulated charge-pump output is 4.75V
Small external components uses a 0.047μF, 0.1μF and a 2.2μF capacitor
(EN)
