參數(shù)資料
型號(hào): S-8460B00AFT-TB
元件分類(lèi): 穩(wěn)壓器
英文描述: 0.1 A SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO16
封裝: TSSOP-16
文件頁(yè)數(shù): 29/33頁(yè)
文件大小: 617K
代理商: S-8460B00AFT-TB
STEP-UP OR DOWN, SINGLE-COIL, PWM CONTROL SWITCHING REGULATOR CONTROLLER
Rev.1.2_00
S-8460
Seiko Instruments Inc.
5
Electrical Characteristics
Table 3
(Unless otherwise specified : VIN
= 5.0 V, IOUT = 66 mA, output voltage is set to 3.3 V, Ta = 25°C)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
Measurement
Circuit
Output voltage at step-down VOUTD
VIN
= 4.95 V
3.234
3.3
3.366
V
2
Output voltage at step-up
VOUTU
VIN
= 2.64 V
3.234
3.3
3.366
V
2
Input voltage
VIN
2.2
18.0
V
2
Current consumption 1
ISS1
No external parts, VOUT
= 3.3 V × 0.95 V
(step-up mode at MaxDuty)
900
1380
A
1
Current consumption 2
ISS2
No external parts, VOUT
= 3.3 V + 0.5 V
(step-down mode at 0% Duty)
75
150
A
1
Current consumption at
shutdown
ISSS
VON/OFF
= 0 V
0.5
2.0
A
1
VL pin output voltage
VL
The same condition as ISS2
4.32
4.50
4.68
V
1
IEXT1, 2, 3H
VVL
= 4.5 V, VEXT1, 2, 3 = VVL 0.2
30
40
mA
1
EXT1, 2, 3 pin output current
IEXT1, 2, 3L
VEXT1, 2, 3
= 0.2 V
40
60
mA
1
Line regulation
VOUT1
VIN
= 2.2 to 18.0 V
VOUTD
× 1.0%
VOUTD
× 2.0%
V
2
Load regulation
VOUT2
IOUT
= 10 A to 1.25 × 66 mA
VIN
= 4.95 V
VOUTD
× 1.0%
VOUTD
× 2.0%
V
2
Output voltage temperature
coefficient
VOUT
Ta VOUT
Ta
= 40 to +85°C
±100
ppm/
°C
Oscillation frequency
fOSC
The same condition as ISS1, waveform at EXT3
pin is measured.
255
300
345
kHz
1
Maximum duty ratio
MaxDuty
The same condition as ISS1, waveform at EXT3
pin is measured.
70
78
85
%
1
FB pin input current
IFB
The same condition as ISS1
0.0
0.1
A
1
VSH
The same condition as ISS2, judged by voltage
output at VL pin.
1.6
V
1
ON/OFF pin input voltage
VSL
The same condition as ISS2, judged by voltage
output at VL pin.
0.4
V
1
ISH
The same condition as ISS1, VON/OFF
= VIN
0.1
0.1
A
1
ON/OFF pin input leakage
current
ISL
The same condition as ISS1, VON/OFF
= 0 V
0.1
0.1
A
1
Soft-start time
tSS
The same condition as ISS1, time for EXT3 pin to
start is measured.
6.0
12.0
24.0
ms
1
Integration time of protection
circuit
tPRO
The same condition as ISS1, CSS pin : OPEN,
CPRO : 2200 pF, repeat time of CPRO pin is
measured.
1.25
2.5
5.0
ms
1
Efficiency at step-down
EFFI1
VIN
= 4.95 V, IOUT = 200 to 600 mA
87
%
2
Efficiency at step-up
EFFI2
VIN
= 2.64 V, IOUT = 50 to 400 mA
83
%
2
External parts
Coil :
Sumida Corporation
CDRH104R (22
H)
Diode :
Matsushita Electric Industrial Co., Ltd.
MA2Q737 (Schottky)
Rohm Corporation
RB411D (Schottky)
Capacitor :
Nichicon Corporation
F93 (16 V, 47
F, tantalum) × 4
Transistor : Fairchild Semiconductor Corporation
FDN337N
× 3
CVL :
4.7
F (ceramic)
CSS :
4700 pF
CPRO :
2200 pF
CBST :
0.1
F
RFB1 :
230 k
RFB2 :
100 k
Cfzfb :
330 pF
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