SWITCHING REGULATOR. S-85S1A Datasheet

S-85S1A REGULATOR. Datasheet pdf. Equivalent

Part S-85S1A
Description SWITCHING REGULATOR
Feature S-85S1A Series www.ablicinc.com © ABLIC Inc., 2017 5.5 V INPUT, 200 mA SYNCHRONOUS STEP-DOWN SWITC.
Manufacture ABLIC
Datasheet
Download S-85S1A Datasheet

S-85S1A Series 5.5 V INPUT, 200 mA SYNCHRONOUS STEP-DOWN w S-85S1A Datasheet
S-85S1A Series www.ablicinc.com © ABLIC Inc., 2017 5.5 V I S-85S1A Datasheet
Recommendation Recommendation Datasheet S-85S1A Datasheet





S-85S1A
S-85S1A Series
www.ablic.com
5.5 V INPUT, 200 mA SYNCHRONOUS STEP-DOWN
SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT
© ABLIC Inc., 2017-2018
Rev.1.4_00
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
Applications
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
Wearable device
Bluetooth device
Wireless sensor network device
Healthcare equipment
Smart meter
Portable game device
Package
SNT-6A
(1.80 mm × 1.57 mm × t0.5 mm max.)
Typical Application Circuit
VIN
CIN
10 F
VIN
PVSS
L
2.2 H
SW
VOUT
EN
VSS
VOUT
COUT
10 F
Efficiency
VOUT(S) = 1.8 V
100
80 VIN = 2.5 V
60 VIN = 3.6 V
40
VIN = 4.2 V
20
0
0.01 0.1
1 10
IOUT [mA]
100 1000
1



S-85S1A
5.5 V INPUT, 200 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT
S-85S1A Series
Rev.1.4_00
Block Diagram
VOUT
EN
VIN CIN VIN
Ripple generation circuit
SW
Enable
circuit
Error amplifier
+
ON time generation
+ circuit
Output control circuit
Reference voltage circuit
Soft-start cicuit
Thermal shutdown circuit
UVLO circuit
UVP circuit
+
Reverse current
detection circuit
+
Overcurrent protection circuit
SW L
PVSS
VOUT
COUT
Figure 1
VSS
2





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