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

SNT-8A (PH008-A)

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 (V_IN) of the DC-DC converter into V_IN/2 or V_IN/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 ≤ V_OUT ≤ 3.9 V)

±15 mV (0.7 V ≤ V_OUT < 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

V_IN/2 (S-85S0PCxx)

V_IN/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