S-85S1P Series
POWER MONITORING OUTPUT,
5.5 V INPUT, 200 mA SYNCHRONOUS STEP-DOWN
SWITCHING REGULATOR WITH 260 nA QUIESCENT CURRENT
www.sii-ic.com
© SII Semiconductor Corporation, 2017
Rev.1.3_00
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 power monitoring output is prepared in the S-85S1P Series. The power monitoring output is a function
that divides the input voltage (VIN) of the DC-DC converter into VIN/2 or VIN/3 and outputs the voltage. For example, 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
• Ultra low current consumption:
• Efficiency (when under 100 μA load):
• Fast transient response:
• Input voltage:
• Wearable device
260 nA quiescent current
90.5%
COT control
• Bluetooth device
• Wireless sensor network device
• Healthcare equipment
• Smart meter
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
1.5% (1.0 V ≤ VOUT ≤ 3.9 V)
15 mV (0.7 V ≤ VOUT < 1.0 V)
1.0 MHz (at PWM operation)
420 mΩ
• Portable game device
• Output voltage accuracy:
Package
• Switching frequency:
• SNT-8A
( 2.46 mm
• High side power MOS FET on-resistance:
• Low side power MOS FET on-resistance:
• Soft-start function:
× 1.97 mm × t0.5 mm max.)
320 mΩ
1 ms typ.
• Under voltage lockout function (UVLO):
• Thermal shutdown function:
1.8 V typ. (detection voltage)
135°C typ. (detection temperature)
450 mA (at L = 2.2 μH)
• Overcurrent limit function:
•
Automatic recovery type short-circuit protection function:Hiccup control
• Input and output capacitors:
Ceramic capacitor compatible
Power monitor block
• Low current consumption:
• Input voltage:
280 nA typ.
1.5 V to 5.5 V
VIN/2 (S-85S1PCxx)
VIN/3 (S-85S1PDxx)
• Output voltage:
Overall
• Operation temperature range:
• Lead-free (Sn 100%), halogen-free
Ta = −40°C to +85°C
Typical Application Circuit
Efficiency
L
VOUT(S) = 1.8 V
2.2 H
V
IN
V
OUT
100
80
60
40
20
0
VIN
SW
C
10 F
OUT
C
IN
10 F
V
IN = 2.5 V
PVSS
EN
VOUT
V
IN = 3.6 V
V
IN = 4.2 V
PMEN
PMOUT
0.01
0.1
1
10
100 1000
C
PM
VSS
0.22 F
I
OUT [mA]
1