Power Management ICs

Supply Voltage Divided Output, 5.5 V Input, 50 mA Synchronous Step-down switching Regulator with 260 nA Quiescent Current S-85S0P Series

The S-85S0P Series introduces own distinctive low power consumption control and COT (Constant On-Time) control, features ultra low current consumption (260 nA quiescent current) and fast transient response, operates at PFM control. The S-85S0P Series realizes high efficiency in a wide range of load current consumption and provides strong support for extended period operation of mobile devices and wearable devices which are equipped with compact batteries. The function of the supply voltage divided output is prepared in the S-85S0P Series. The supply voltage divided output is a function that divides the input voltage (VIN) of the DC-DC converter into VIN/2 or VIN/3 and outputs the voltage. For example, this function makes it possible that the IC connects to a low voltage microcontroller A/D converter directly and the microcontroller monitors a battery voltage.

Features

DC-DC converter block

Ultra low current consumption
260 nA quiescent current
Efficiency (when under 100 μA load)
90.5%
Fast transient response
COT control
Input voltage
2.2 V to 5.5 V
Output voltage
0.7 V to 2.5 V, in 0.05 V step
2.6 V to 3.9 V, in 0.1 V step
Output voltage accuracy
±1.5% (1.0 V ≤ VOUT ≤ 3.9 V)
±15 mV (0.7 V ≤ VOUT < 1.0 V)
High side power MOS FET on-resistance
420 mΩ
Low side power MOS FET on-resistance
320 mΩ
Soft-start function
1 ms typ.
Under voltage lockout function (UVLO)
1.8 V typ. (detection voltage)
Thermal shutdown function
135°C typ. (detection temperature)
Overcurrent protection function
300 mA (at L = 2.2 μH)
Automatic recovery type short-circuit protection function
Hiccup control
Input and output capacitors
Ceramic capacitor compatible

Supply voltage divider block

Low current consumption
280 nA typ.
Input voltage
1.5 V to 5.5 V
Output voltage
VIN/2 (S-85S0PCxx)
VIN/3 (S-85S0PDxx)

Overall

Operation temperature range
Ta = −40°C to +85°C
Lead-free (Sn 100%), halogen-free

Applications

  • Wearable device
  • Bluetooth device
  • Wireless sensor network device
  • Healthcare equipment
  • Smart meter
  • Portable game device