Power Management ICs

5.6 V Input, 50 mA, Low EMI, Synchronous Step-down Switching Regulator with 260 nA Quiescent Current S-85M0A Series (WLP product)

DatasheetAug. 01, 2018


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The S-85M0A 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-85M0A 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.
In addition, WLP-6L package suitable for high-density mounting is adopted, it contributes to miniaturization of electronic equipment. By using external parts recommended in this datasheet, the occupancy area can be reduced to 1.6 mm × 2.7 mm = 4.3 mm2. Since the S-85M0A Series suppressing EMI emission minimally, allows for high efficiency, it is adequate for applications such as wireless communication, GPS and other noise-affected devices.


Ultra low current consumption
260 nA quiescent current
Efficiency (when under 100 μA load)
Fast transient response
COT control
Input voltage
2.2 V to 5.6 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 ≤ V OUT ≤ 3.9 V)
±15 mV (0.7 V ≤ V OUT < 1.0 V)
High side power MOS FET on-resistance
360 mΩ
Low side power MOS FET on-resistance
250 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
Discharge shunt function
(S-85M0A Series B type)
(S-85M0A Series C type)
Input and output capacitors
Ceramic capacitor compatible
Operation temperature range
Ta = −40°C to +85°C
Lead-free, halogen-free


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