Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

S8540 Datasheet(PDF) 8 Page - Seiko Instruments Inc

Part # S8540
Description  STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Download  36 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  SII [Seiko Instruments Inc]
Direct Link  http://www.sii.co.jp
Logo SII - Seiko Instruments Inc

S8540 Datasheet(HTML) 8 Page - Seiko Instruments Inc

Back Button S8540 Datasheet HTML 4Page - Seiko Instruments Inc S8540 Datasheet HTML 5Page - Seiko Instruments Inc S8540 Datasheet HTML 6Page - Seiko Instruments Inc S8540 Datasheet HTML 7Page - Seiko Instruments Inc S8540 Datasheet HTML 8Page - Seiko Instruments Inc S8540 Datasheet HTML 9Page - Seiko Instruments Inc S8540 Datasheet HTML 10Page - Seiko Instruments Inc S8540 Datasheet HTML 11Page - Seiko Instruments Inc S8540 Datasheet HTML 12Page - Seiko Instruments Inc Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 36 page
background image
STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8540/8541 Series
Rev.4.0_01
8
2. S-8540/8541 Series B, D types
Table 6
(Ta = 25 °C,unless otherwise specified)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Units
Measure-
ment
Circuit
Output voltage *1, *2
VOUT (E)
VIN = 4.5 V
IOUT = 120 mA
VOUT (S)
× 0.980
VOUT (S)
= 3.000
VOUT (S)
× 1.020
V
4
Input voltage
VIN
2.5
10.0
V
3
Current consumption 1
ISS1
VIN = 4.5 V
100% duty ratio
S-8540/8541B00
180
300
μA
3
S-8540/8541D00
140
240
Current consumption
during shutdown
ISSS
VON/OFF = 0 V
VOUT = VOUT (S)
× 0.95
1.0
μA
3
EXT pin output current
IEXTH
VIN = 10 V, VEXT = VIN
− 0.2 V
− 32
− 48
mA
3
IEXTL
VIN = 10 V, VEXT = 0.2 V
45
66
mA
3
Line regulation
ΔVOUT1
3.3
≤ VIN ≤ 10 V, IOUT = 120 mA
30
60
mV
4
Load regulation
ΔVOUT2
10
μA ≤ IOUT ≤ 150 mA
30
60
mV
4
Output voltage
temperature coefficient
Δ
Δ
V
Ta V
OUT
OUT
VIN = VOUT (S)
× 1.5, IOUT = 120 mA
− 40 ≤ Ta ≤ + 85°C
± 100
ppm/
°C
4
Oscillation frequency
fOSC
Measure waveform at
S-8540/8541B00
510
600
690
kHz
4
the EXT pin.
S-8540/8541D00
255
300
345
Maximum duty ratio
MaxDuty
Measure waveform at the EXT pin.
100
%
4
PWM/PFM-control switch
duty ratio *3
PFM Duty
VIN = VOUT (S)
× 1.5 V, no load
19
29
39
%
4
Current limit detection
voltage
VSENSE
VIN = 4.5 V, Measure waveform at the EXT pin.
100
125
150
mV
3
SENSE pin input current
ISENSE
VIN = 4.5 V, VSENSE = VIN
− 0.1 V
6.7
11.2
16.8
μA
3
Shutdown pin
input voltage
VSH
VIN = 4.5 V, Judge VOUT (S)
× 0.98.
2.3
V
4
VSL
VIN = 4.5 V, Judge CVREF pin "L".
0.3
V
3
Shutdown pin
input leakage current
ISH
VIN = 4.5 V, VON/OFF = VOUT
− 0.1
0.1
μA
3
ISL
VIN = 4.5 V, VON/OFF = 0 V
− 0.1
0.1
μA
3
Soft-start time
tSS
Time until VOUT (E) reaches 90% or higher of the
VOUT (S)
7.0
12.0
17.0
ms
4
Efficiency
EFFI
90
%
4
External components:
Coil (L)
:Sumida Corporation CDRH6D28-100
Diode (SD)
:Matsushita Electric Inducstrial Co., Ltd. MA2Q737 (Schottky diode)
Output capacitor (COUT)
:Nichicon Corporation F93 (16 V, 47
μF, tantalum)
Input capacitor (CIN)
:Nichicon Corporation F93 (16 V, 47
μF, tantalum)
Transistor (PSW)
:Toshiba Corporation 2SA1213
Base resistor (Rb)
:100 m
Ω
Base capacitor (Cb)
:2200 pF
CVL
:1.0
μF
CSS
:0.047
μF
RSS
:220 k
Ω
RSENSE
:100 m
Ω
RA
:200 k
Ω
RB
:100 k
Ω
CFB
:50 pF
Condition: Connect recommended parts unless otherwise specified. VIN =4.5 V, IOUT =120 mA
*1. VOUT (S) : Specified output voltage value, VOUT (E) : Actual output voltage value
*2. The typical value (specified output voltage value) is VOUT (S) = 1
+ RA/RB = 3.0 V. See “Output Voltage adjustment”.
*3. S-8541 series only
Caution 1. Line regulation and load regulation may change greatly due to GND wiring when VIN is high.
2. In the S-8540 series (PWM control), a state in which the duty ratio 0% continues for several
clocks may occur when the input voltage is high and the output current is low. In this case,
the operation changes to the pseudo PFM mode, but the ripple voltage hardly increases.


Similar Part No. - S8540

ManufacturerPart #DatasheetDescription
logo
Hamamatsu Corporation
S8543 HAMAMATSU-S8543 Datasheet
123Kb / 2P
   One-dimensional PSD Long, narrow active area and surface mountable package
More results

Similar Description - S8540

ManufacturerPart #DatasheetDescription
logo
Seiko Instruments Inc
S-8540 SII-S-8540 Datasheet
445Kb / 36P
   STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S8340 SII-S8340 Datasheet
3Mb / 55P
   STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S8520 SII-S8520 Datasheet
2Mb / 44P
   STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
logo
ABLIC Inc.
S-8520 ABLIC-S-8520 Datasheet
612Kb / 44P
   STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.9.0_02
logo
Seiko Instruments Inc
S8355 SII-S8355 Datasheet
3Mb / 72P
   STEP-UP, SUPER-SMALL PACKAGE, 600 kHz, PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
logo
ABLIC Inc.
S-8355 ABLIC-S-8355 Datasheet
853Kb / 72P
   STEP-UP, SUPER-SMALL PACKAGE, 600 kHz, PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.8.1_02
logo
Seiko Instruments Inc
S-8365AAABA-M5T1Y2 SII-S-8365AAABA-M5T1Y2 Datasheet
3Mb / 63P
   PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8355K18MC-NADT2X SII-S-8355K18MC-NADT2X Datasheet
3Mb / 72P
   PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S8353 SII-S8353 Datasheet
2Mb / 49P
   STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
logo
ABLIC Inc.
S-8353 ABLIC-S-8353 Datasheet
567Kb / 49P
   STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_02
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com