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Ablic S-85S0A

5.5 V INPUT, 50 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT

Overview

TopologyBuck Converter
Input voltage3.6 V

Description

The S-85S0A 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-85S0A Series realizes high efficiency in a wide range of load current consumption and provides strong support forextended period operation of mobile devices and wearable devices which are equipped with compact batteries.The S-85S0A Series can configure a step-down regulator only with a coil, an input capacitor, and an output capacitor. Byusing external parts recommended in this datasheet, the occupancy area can be reduced to 1.6 mm × 4.3 mm = 6.9 mm2,and it contributes to miniaturization of electronic equipment.

Features

Ultra low current consumption260 nA quiescent currentEfficiency (when under 100 μA load)90.5%Fast transient responseCOT controlInput voltage2.2 V to 5.5 VOutput voltage0.7 V to 2.5 V, in 0.05 V step2.6 V to 3.9 V, in 0.1 V stepOutput voltage accuracy±1.5% (1.0 V ≤ VOUT ≤ 3.9 V)±15 mV (0.7 V ≤ VOUT < 1.0 V)High side power MOS FET on-resistance : 420 mΩ Low side power MOS FET on-resistance : 320 mΩ Soft-start function1 ms typ.Under voltage lockout function (UVLO)1.8 V typ. (detection voltage)Thermal shutdown function135°C typ. (detection temperature)Overcurrent limit function300 mA (at L = 2.2 μH)Automatic recovery type short-circuit protection functionHiccup control Input and output capacitorsCeramic capacitor compatibleOperation temperature rangeTa = −40°C to +85°CLead-free (Sn 100%), halogen-free

Typical applications

  • Smart Meter/ Wireless sensor network device
  • Healthcare equipment
  • Wearable device/ Bluetooth device/ Portable game device

Products

Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Mount Samples
74438313022
STE ALT EAG CAD LTS PSP SPE IGS CADWE-MAPI SMT Power Inductor 2.2 0.85 2.5 337 388 70 SMT
Order Code Data­sheet
74438313022
Samples
Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Mount Samples