S-85S1A Series
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© ABLIC Inc., 2017-2018
5.5 V INPUT, 200 mA SYNCHRONOUS STEP-DOWN
SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT
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 mm
2
,
and it contributes to miniaturization of electronic equipment.
Features
•
Ultra low current consumption:
•
Efficiency (when under 100
μA
load):
•
Fast transient response:
•
Input voltage:
•
Output voltage:
260 nA quiescent current
90.5%
COT control
2.2 V to 5.5 V
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)
•
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)
135°C typ. (detection temperature)
•
Thermal shutdown function:
•
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
Applications
•
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
V
IN
C
IN
10
F
L
2.2
H
VIN
PVSS
EN
VSS
SW
VOUT
V
OUT
C
OUT
10
F
Efficiency
V
OUT(S)
= 1.8 V
100
80
60
40
20
0
0.01
V
IN
= 2.5 V
V
IN
= 3.6 V
V
IN
= 4.2 V
0.1
1
10
I
OUT
[mA]
100
1000
1
5.5 V INPUT, 200 mA SYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT
Rev.1.4
_00
S-85S1A Series
Product Name Structure
Users can select output voltage for the S-85S1A Series. Refer to "1.
Product name"
regarding the contents of
product name, "2.
Package"
regarding the package, "3.
Product name list"
regarding details of the product
name.
1.
Product name
S-85S1A B
xx
-
I6T1
U
Environmental code
U:
Lead-free (Sn 100%), halogen-free
Package name abbreviation and packing specification
I6T1: SNT-6A, Tape
*2, *3
*1
Output voltage
07 to 39
(e.g., when the output voltage is 0.7 V, it is expressed as 07.)
*1.
*2.
*3.
Refer to the tape drawing.
Refer to "3.
Product name list".
In the range from 0.7 V to 2.5 V, the products which have 0.05 V step are also available.
Contact our sales office when the product is necessary.
2.
Package
Table 1
Package Name
SNT-6A
Dimension
PG006-A-P-SD
Package Drawing Codes
Tape
PG006-A-C-SD
Reel
PG006-A-R-SD
Land
PG006-A-L-SD
3
Embedded System
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