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參數資料
| 型號： | MAX786CAI |
| 廠商： | Maxim Integrated |
| 文件頁數： | 8/20頁 |
| 文件大小： | 305K |
| 描述： | IC REG QD BCK/LINEAR SYNC 28SSOP |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 46 |
| 拓撲： | 降壓（降壓）同步（2），線性（LDO）（2） |
| 功能： | 任何功能 |
| 輸出數： | 4 |
| 頻率 - 開關： | 300kHz，200kHz |
| 電壓/電流 - 輸出 1： | 控制器 |
| 電壓/電流 - 輸出 2： | 控制器 |
| 電壓/電流 - 輸出 3： | 5V，5mA |
| 帶 LED 驅動器： | 無 |
| 帶監控器： | 無 |
| 帶序列發生器： | 無 |
| 電源電壓： | 5.5 V ~ 30 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-SSOP（0.209"，5.30mm 寬） |
| 供應商設備封裝： | 28-SSOP |
| 包裝： | 管件 |
| 其它名稱： | 146982F |
Dual-Output Power-Supply
Controller for Notebook Computers
8 _______________________________________________________________________________________
The MAX786 has two close relatives: the MAX782 and
the MAX783. The MAX782 and MAX783 each include
an extra flyback winding regulator and linear regulators
for dual, +12V/programmable PCMCIA VPP outputs.
The MAX782/MAX783 data sheet contains extra appli-
cations information on the MAX786 not found in this
data sheet.
+3.3V Switch-Mode Supply
The +3.3V supply is generated by a current-mode,
PWM step-down regulator using two N-channel
MOSFETs, a rectifier, and an LC output filter (Figure 1).
The gate-drive signal to the high-side MOSFET, which
must exceed the battery voltage, is provided by
a boost circuit that uses a 100nF capacitor connected
to BST3.
_________________Detailed Description
The MAX786 converts a 5.5V to 30V input to four outputs
(Figure 1). It produces two high-power, PWM, switch-
mode supplies, one at +5V and the other at +3.3V. The
two supplies operate at either 300kHz or 200kHz,
allowing for small external components. Output current
capability depends on external components, and can
exceed 6A on each supply. An internal 5V, 5mA supply
(VL) and a 3.3V, 5mA reference voltage are also gener-
ated via linear regulators, as shown in Figure 2. Fault
protection circuitry shuts off the PWMs when the inter-
nal supplies lose regulation.
Two precision voltage comparators are also included.
Their output stages permit them to be used as level
translators for driving external N-channel MOSFETs in
load-switching applications, or for more conventional
logic signals.
MAX786
V+ VL
23 22
INPUT
5.5V TO 30V
(NOTE 1) C1
33礔
D2A
1N4148
C5
0.1礔
25
27
18
16
17
GND REF PGND
C3
1礔
+3.3V AT 5mA
BST3
DH3
LX3
BST5
DH5
LX5
9 10 20
N1
C9
0.01礔
+3.3V ON/OFF
+5V ON/OFF
SHUTDOWN
OSC SYNC
INPUT VOLTAGE RANGE 6.5V TO 30V
AS SHOWN. SEE LOW-VOLTAGE
(6-CELL) OPERATION SECTION FOR
DETAILS.
NOTE 1:
USE SHORT, KELVIN-CONNECTED PC
BOARD TRACES PLACED VERY CLOSE
TO ONE ANOTHER.
NOTE 2:
COMPARATOR SUPPLY INPUT
IN
OUT
COMPARATOR 1
IN
OUT
COMPARATOR 2
(NOTE 2)
C8
0.01礔
N4
D3
1N5819
L2
10礖
R2
25m
+5V
AT
3A
C6
330礔
+5V AT 5mA
4.7礔
C10
33礔
N2
D2B
1N4148
C4
0.1礔
2
3
13
12
11
14
6
4
8
5
7
SS3
ON3
ON5
SHDN
SYNC
SS5
VH
D1
Q1
D2
Q2
19
15
21
DL5
CS5
FB5
(NOTE 2)
N3
26
D1
1N5819
L1
10礖
R1
25m&
+3.3V
AT
3A
C12
150礔
24
1
28
DL3
CS3
FB3
C7
150礔
Figure 1. MAX786 Application Circuit
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX786CAI+ | 功能描述:DC/DC 開關控制器 Dual-Output Power Supply Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MAX786CAI+T | 功能描述:DC/DC 開關控制器 Dual-Output Power Supply Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MAX786CAI-T | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MAX786EAI | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MAX786EAI+ | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
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