S-8363B-I6T1U2 Datasheet, PDF (6/50 Pages) Seiko Instruments Inc – PWM/PFM SWITCHABLE SWITCHING REGULATOR

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR
S-8363 Series
Rev.2.0_01
 Electrical Characteristics
Table 5 Electrical Characteristics
(VIN = 1.8 V, VOUT = 3.3 V, Ta = +25°C unless otherwise specified)
Item
Symbol
Conditions
Min.
Typ.
Max.
Unit
Test
Circuit
Operating start voltage^*1
VST
IOUT = 1 mA, VOUT(S)^*2 = 3.3 V
⎯
⎯
0.9
V
2
Operating input voltage
VIN
⎯
⎯
⎯
4.5
V
2
Output voltage range
VOUT(R)
⎯
1.8
⎯
5.0
V
2
FB voltage
VFB
⎯
0.585 0.600 0.615 V
1
FB voltage temperature
coefficient
FB pin input current
ΔVFB
ΔTa
IFB
Ta = −40°C to +85°C
VOUT = 1.8 V to 5.5 V, FB pin
⎯ ±100 ⎯ ppm/°C 1
−0.1 ⎯ ＋0.1 μA
1
Current consumption during
IIN1
During switching, at no load
operation
ISS1
VFB = VFB(S)^*3 × 0.95
⎯
6
15
μA
1
⎯ 450 650 μA
1
Current consumption during
IIN2
During switching stop
⎯
6
15
μA
1
switching off
Current consumption during
power-off
ISS2
ISSS
VFB = VFB(S)× 1.1
VON / OFF = 0 V,
VIN = VOUT = 4.5 V
⎯
95 150 μA
1
⎯
⎯
3.0
μA
1
Oscillation frequency
fOSC
⎯
1.0 1.2 1.4 MHz 2
Maximum duty ratio
MaxDuty VFB = VFB(S) × 0.95
82
88
94
%
2
PWM / PFM switching duty ratio PFMDuty
⎯
⎯
13
⎯
%
2
Power MOS FET ON resistance^*4 RNFET
Power MOS FET leakage current ILSW
⎯
VON / OFF = 0 V
⎯ 0.25 ⎯
Ω
1
⎯ 0.01 0.5 μA
1
Limited current
High level input voltage
Low level input voltage
High level input current
Low level input current
ILIM
⎯
0.9 1.1 1.3
A
3
VSH
VIN = 1.8 V to 4.5 V, ON/OFF pin 0.75 ⎯
⎯
V
1
VSL
VIN = 1.8 V to 4.5 V, ON/OFF pin ⎯
⎯ 0.25 V
1
ISH
VIN = 1.8 V to 4.5 V, ON/OFF pin −0.1 ⎯
0.1
μA
1
ISL
VIN = 1.8 V to 4.5 V, ON/OFF pin −0.1 ⎯
0.1
μA
1
Soft-start time^*5
tSS
⎯
0.6 1.2 1.8 ms
2
*1. This is the guaranteed value measured with external parts shown in “Table 6 External Parts List” and with test
circuits shown in Figure 6. The operating start voltage varies largely depending on diode’s forward voltage. Perform
sufficient evaluation with actual application.
*2. VOUT(S) can be set by the ratio of VFB value and the output voltage setting resistors (RFB1, RFB2). For details, refer to “
External Parts Selection”.
*3. VFB(S) is a setting value for FB voltage.
*4. Power MOS FET ON resistance largely varies depending on the VOUT voltage.
*5. This is when the VOUT voltage startups from the STU release voltage or more. The soft-start time largely varies
depending on the load current and the input voltage when the S-8363 Series startups from the STU release voltage
or less, because the S-8363 Series once enters the start-up mode. Refer to “ 2. Low voltage start-up” for STU
release voltage.
 External Parts List When Measuring Electrical Characteristics
Element name
Inductor
Diode
Input capacitor
Output capacitor
FB pin capacitor
Output voltage setting resistor 1
Output voltage setting resistor 2
Table 6 External Parts List
Symbol
Constants
Manufacturer
L
2.2 μH
TDK Corporation
SD
－
TOSHIBA CORPORATION
CIN
COUT
CFB
RFB1
RFB2
1 μF
10 μF
47 pF
68 kΩ
15 kΩ
TAIYO YUDEN Co., Ltd.
TAIYO YUDEN Co., Ltd.
TAIYO YUDEN Co., Ltd.
ROHM Co., Ltd.
ROHM Co., Ltd.
Part number
VLF302510
CRS08
EMK107B7105KA
LMK212BJ106KD
UMK105CH470JV
MCR03 series
MCR03 series
6