S-85S1PC18-I8T1U ABLIC

S-85S1P Series SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 200 mA SYNCHRONOUS STEP-DOWN www.ablic.com SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT ABLIC Inc., 2017-2018 Rev.1.5 01 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 (V ) of the DC-DC converter into V /2 or V /3 and outputs the voltage. For example, IN IN IN 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 Applications DC-DC converter block Wearable device Ultra low current consumption: 260 nA quiescent current Bluetooth device Efficiency (when under 100 A load): 90.5% 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 Output voltage accuracy: 1.5% (1.0 V V 3.9 V) OUT Package 15 mV (0.7 V V < 1.0 V) OUT Switching frequency: 1.0 MHz (at PWM operation) SNT-8A High side power MOS FET on-resistance: 420 m ( 2.46 mm 1.97 mm t0.5 mm max.) Low side power MOS FET on-resistance: 320 m Soft-start function: 1 ms typ. Under voltage lockout function (UVLO): 1.8 V typ. (detection voltage) Thermal shutdown function: 135C typ. (detection temperature) Overcurrent protection function: 450 mA (at L = 2.2 H) 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 /2 (S-85S1PCxx) IN V /3 (S-85S1PDxx) IN Overall Operation temperature range: Ta = 40C to +85C Lead-free (Sn 100%), halogen-free Typical Application Circuit Efficiency L V = 1.8 V OUT(S) 2.2 H VIN VOUT 100 VIN SW CIN COUT 80 10 F 10 F VIN = 2.5 V PVSS VOUT 60 VIN = 3.6 V 40 EN VIN = 4.2 V 20 PMEN PMOUT 0 CPM 0.01 0.1 1 10 100 1000 VSS 0.22 F IOUT mA 1 SUPPLY VOLTAGE DIVIDED OUTPUT, 5.5 V INPUT, 200 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT S-85S1P Series Rev.1.5 01 Block Diagram CIN VIN VIN VOUT SW + L VOUT + SW + COUT + PVSS EN UVLO VIN PMEN PMOUT + CPM VSS Figure 1 2