SNT-6A (PG006-A)The S-85S1A 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-85S1A 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 S-85S1A Series can configure a step-down regulator only with a coil, an input capacitor, and an output capacitor. By using external parts recommended in this datasheet, the occupancy area can be reduced to 2.0 mm × 4.5 mm = 9.0 mm2, and it contributes to miniaturization of electronic equipment.
Features
- 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 protection function
- 450 mA (at L = 2.2 μH)
- Automatic recovery type short-circuit protection function:Hiccup control
- Input and output capacitors
- Ceramic capacitor compatible
- 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