SNT-8A (PH008-A)
The S-85S1P Series introduces own distinctive low power consumption control and COT (Constant On-Time) control and features ultra low current consumption and fast transient response. PWM / PFM switching control automatically switches to PFM control when under light load, and the IC operates at ultra low current consumption of 260 nA quiescent current. The S-85S1P 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-85S1P 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)
- Switching frequency
- 1.0 MHz (at PWM operation)
- 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 limit function
- 450 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-85S1PCxx)
- Vin/3 (S-85S1PDxx)
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
High efficiency 90.5% (at 100μA load)
The world's lowest current consumption of 260nA makes it possible to achieve high efficiency even under light load. Supports extended operation of wearable and other devices which are equipped with compact batteries.
*Based on available information
