MAX866

0.8V to 6.0V Input Supply Voltage
0.9V Guaranteed Start-Up Supply Voltage
>80% Efficiency Over Wide Load Range
100µA No-Load Battery Current (VOUT= 3.3V)
1µA Shutdown Mode
Up to 250kHz Switching Frequency
±1.5% Reference Tolerance
Low-Battery Detector (LBI/LBO)
Available in Ultra-Small 8-Pin µMAXPackage
  (1.11mm high)
Circuit Fits in 0.2in²

Supply Voltage (OUT to GND) .....................................-0.3V, +7V
Switch Voltage (LX to GND) ........................................-0.3V, +7V
SHDN, LBO to GND.......................................................-0.3V, +7V
LBI, REF, 3/5, FB to GND............................-0.3V, (VOUT+ 0.3V)
Reference Current (IREF) ..................................................2.5mA
Continuous Power Dissipation (T_A= +70°C)
SO (derate 5.88mW/°C above +70°C) ............................471mW
µMAX(derate 4.1mW/°C above +70°C) ...........................330mW

Reverse Battery Current (T_A+45°C) (Note 1)..................750mA
Operating Temperature Ranges
MAX86_C/D ............................................................0°C to +70°C
MAX86_E_A ........................................................-40°C to +85°C
Junction Temperature .....................................................+150°C
Storage Temperature Range ............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C

The MAX866 and MAX867 are ultra-small, high-efficiency, CMOS, step-up, DC-DC switching regulators for 1-cell battery-powered systems. The MAX866 accepts a posi- tive input voltage between 0.8V and VOUT and converts it to a higher, pin-selectable output voltage of 3.3V or 5V. The MAX867 adjustable version accepts 0.8V to 6.0V input voltages and generates a higher adjustable output voltage in the 2.7V to 6.0V range. Typical efficiencies aregreater than 80%. Typical no-load supply current of MAX866 is100µA (1µA in shutdown).

The MAX866/MAX867 combine ultra-low quiescent sup- ply current and high efficiency to give maximum battery life. Its high switching frequency permits the use of small, low-cost inductors and capacitors. Additionally, internal peak-current limiting protects the IC.