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參數(shù)資料
| 型號： | Si786DSG |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | Dual-Output Power-Supply Controller |
| 中文描述： | 雙輸出電源控制器 |
| 文件頁數(shù)： | 7/14頁 |
| 文件大?。?/td> | 130K |
| 代理商： | SI786DSG |
Si786
Vishay Siliconix
Document Number: 70189
S-40807—Rev. J, 26-Apr-04
www.vishay.com
7
PIN DESCRIPTION AND ORDERING INFORMATION
CS
3
SS
3
ON
3
D
1
D
2
V
H
Q
2
Q
1
GND
FB
3
DH
3
LX
3
BST
3
DL
3
V+
SSOP-28
V
L
FB
5
PGND
Top View
25
26
27
28
2
3
4
1
22
23
24
5
6
7
REF
DL
5
BST
5
LX
5
DH
5
CS
5
SYNC
SHDN
ON
5
SS
5
18
19
20
21
9
10
11
8
15
16
17
12
13
14
PIN DESCRIPTION
Pin
Symbol
Description
1
2
3
4
5
6
CS
3
SS
3
ON
3
D
1
D
2
V
H
Current-sense input for 3.3-V Buck controller—this pins over current threshold is 100 mV with respect to FB
3
.
Soft-start input for 3.3 V. Connect capacitor from SS
3
to GND.
ON/OFF logic input disables the 3.3-V Buck controller. Connect directly to V
L
for automatic turn-on.
Comparator #1 noninverting input, threshold = 1.650 V. Comparator #1 output = Q1. Connect to GND if unused.
Comparator #2 noninverting input (see D
1
).
External bias supply-voltage input for comparators #1 and #2.
Comparator #2 output. Sources 20 A from V
H
when D
2
is high. Sinks 500 A to GND when D
2
is low regardless of V
H
input
voltage.
Comparator #1 output (see Q
2
).
Analog ground.
3.3-V reference output. Supplies external loads up to 5 mA.
Oscillator control/synchronization input. Connect capacitor to GND, 1- F/mA output or 0.22 F minimum. For external clock
synchronization, a rising edge starts a new cycle to start. To use internal 200-kHz oscillator, connect to VL or GND. For
300-kHz oscillator, connect to REF.
Shutdown logic input, active low. Connect to V
L
for automatic turn-on. The 5-V V
L
supply will not be disabled in shutdown allow-
ing connection to SHDN.
ON/OFF logic input disables the 5-V Buck Controller. Connect to V
L
for automatic turn-on.
Soft-start control input for 5 V Buck controller. Connect capacitor from SS
5
to GND.
Current-sense input for 5 V Buck controller—this pins over current threshold is 100 mV referenced to FB
3
.
Gate-drive output for the 5-V supply high-side n-channel MOSFET.
Inductor connection for the 5-V supply.
Boost capacitor connection for the 5-V supply.
Gate-drive output for the 5-V supply rectifying n-channel MOSFET.
Power Ground.
7
Q
2
8
9
10
Q
1
GND
REF
11
SYNC
12
SHDN
13
14
15
16
17
18
19
20
ON
5
SS
5
CS
5
DH
5
LX
5
BST
5
DL
5
PGND
21
22
23
24
25
26
27
28
FB
5
V
L
V+
DL
3
BST
3
LX
3
DH
3
FB
3
Feedback input for the 5-V Buck controller.
5-V logic supply voltage for internal circuitry—able to source 5-mA external loads. V
L
remains on with valid voltage at V+.
Supply voltage input.
Gate-drive output for the 3.3-V supply rectifying n-channel MOSFET.
Boost capacitor connection for the 3.3-V supply.
Inductor connection for the 3.3-V supply.
Gate-drive output for the 3.3-V supply high-side n-channel MOSFET.
Feedback input for the 3.3-V Buck controller.
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| SI786DSG-E3 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Dual 3.6V Step-Down RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| SI786DSG-T1 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Dual 3.6V Step-Down RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| SI786DSG-T1-E3 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Dual 3.6V Step-Down RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| SI786LG | 功能描述:DC/DC 開關(guān)控制器 3.3V Power Sup Cont RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| SI786LG-E3 | 功能描述:DC/DC 開關(guān)控制器 3.3V Power Sup Cont RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
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