S-85V1A Series

www.sii-ic.com

5.5 V INPUT, 200 mA SYNCHRONOUS STEP-DOWN

SWITCHING REGULATOR WITH 10

μA QUIESCENT CURRENT

© SII Semiconductor Corporation, 2017

1

The S-85V1A Series is a step-down switching regulator which features high efficiency and fast transient response.

Since PWM / PFM switching control automatically switches to PFM control when under light load, high efficiency is

realized. This IC is suitable for mobile devices and battery powered devices due to introduction of own distinctive COT

(Constant On-Time) control.

Also, high-density mounting is realized by adopting super-small, thin SNT-6A package. Therefore, the occupancy area

including a coil, an input capacitor and an output capacitor can be reduced to 2.0 mm

× 4.5 mm = 9.0 mm

contributes to miniaturization of electronic equipment.



Features



Applications

• Current consumption:

10

μA quiescent current

• Bluetooth device

• Efficiency:

93%

• Wireless sensor network device

• Fast transient response:

COT control

• Healthcare equipment

• Input voltage:

2.2 V to 5.5 V

• Smart meter

• Output voltage:

0.7 V to 2.5 V, in 0.05 V step

• Portable game device

2.6 V to 3.9 V, in 0.1 V step

• Remote control

• Output voltage accuracy:

±1.5% (1.0 V



Package

• SNT-6A

(1.80 mm

× 1.57 mm × t0.5 mm max.)

±15 mV (0.7 V

• Switching frequency:

1.0 MHz (at PWM operation)

• High side power MOS FET on-resistance:

450 m

Ω

• Low side power MOS FET on-resistance:

350 m

Ω

• 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

• Operation temperature range:

Ta =

−40°C to +85°C

• Lead-free (Sn 100%), halogen-free



Typical Application Circuit

VSS

VIN

10

F

PVSS

VOUT

EN

SW

10

F

L

2.2

H



Efficiency

110

0.1

1000

100

0

100

80

60

40

20