The MAX1706EEE+ is a 1-cell to 3-cell, high current, low noise, step-up DC-DC converter with linear regulator in 16 pin QSOP package. It use a synchronous rectifier pulse width modulation (PWM) boost topology to generate 2.5V to 5.5V outputs from battery inputs, such as 1 to 3 NiCd/NiMH cells or 1 Li-Ion cell. It has a built-in low-dropout linear regulator that delivers up to 200mA. With an internal synchronous rectifier, MAX1706 deliver 5% better efficiency than similar nonsynchronous converters. It also features a pulse frequency-modulation (PFM) standby mode to improve efficiency at light loads and a 1μA shutdown mode. An efficiency-enhancing track mode reduces the step-up DC-DC converter output to 300mV above the linear regulator output. It is used in digital cordless phones, personal communicators, palmtop computers, wireless handsets, PCS phones and two-way pagers.
- Minimum operating battery voltage is 0.7V (typ), 1.1VIN start-up voltage
- Operating temperature range from -40°C to 85°C
- FB regulation voltage is 1.233V at CLK/SEL = OUT
- Up to 96% efficiency
- Step-up output (2.5V to 5.5V adjustable)
- Linear regulator (1.25V to 5V adjustable)
- PWM/PFM synchronous rectified topology
- 300KHz PWM mode or synchronized
- 1μA shutdown mode
- Voltage monitor, pushbutton on/off control
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