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參數(shù)資料
| 型號： | MAX771ESA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 5V/12V/15V or Adjustable, High-Efficiency, Low IQ, Step-Up DC-DC Controllers |
| 中文描述： | SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | SO-8 |
| 文件頁數(shù)： | 7/20頁 |
| 文件大?。?/td> | 204K |
| 代理商： | MAX771ESA |
M
5V /12V /15V or Adjustable, High-Efficiency,
Low I
Q
, Step-Up DC-DC Controllers
_______________________________________________________________________________________
7
V
IN
= 3V, I
OUT
= 0.5A
A: SHDN, 2V/div
B: V
OUT
, 2V/div
MAX770
EXITING SHUTDOWN
A
B
0
0
200
μ
s/div
______________________________________________________________Pin Desc ription
____________________________Typic al Operating Charac teristic s (c ontinued)
(Circuit of Figure 2a, T
A
= +25°C, unless otherwise noted.)
PIN
NAME
FUNCTION
MAX773
1
—
EXT
Gate drive for external N-channel power transistor
Power-supply input. Also acts as a voltage-sense point when in bootstrapped mode for the
MAX770/MAX771/MAX772, or as a shunt regulator when SGND is connected to ground for the
MAX773. Bypass to SGND with 0.1
μ
F when using the shunt regulator.
Feedback input for adjustable-output operation. Connect to ground for fixed-output operation. Use
a resistor divider network to adjust the output voltage. See Setting the Output Voltage section.
Active-high TTL/CMOS logic-level shutdown input. In shutdown mode, V
OUT
is a diode drop
below V+ (due to the DC path from V+ to the output) and the supply current drops to 5
μ
A
maximum. Connect to ground for normal operation.
1.5V reference output that can source 100
μ
A for external loads. Bypass to GND with 0.1
μ
F.
The reference is disabled in shutdown.
2
3
V+
3
6
FB
4
7
SHDN
5
8
REF
6
7
8
—
9
11
AGND
GND
CS
Analog ground
High-current ground return for the output driver
Positive input to the current-sense amplifier. Connect the current-sense resistor between CS and GND.
Input sense point for 12V-output operation. Connect V
OUT
to V12 for 12V-output operation.
Leave unconnected for adjustable-output operation.
Input sense point for 5V-output operation. Connect V
OUT
to V5 for 5V-output operation. Leave
unconnected for adjustable-output operation.
Low-battery output is an open-drain output that goes low when LBI is less than 1.5V. Connect to V+
through a pull-up resistor. Leave floating if not used. LBO is high impedance in shutdown mode.
—
1
V12
—
2
V5
MAX770
MAX771
MAX772
—
4
LBO
—
—
5
LBI
SGND
Input to the internal low-battery comparator. Tie to GND or V+ if not used.
Shunt regulator ground. Leave unconnected if the shunt regulator is
not
used.
10
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX771ESA+ | 功能描述:DC/DC 開關控制器 5/12/15/AdjV Step Up DC/DC 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(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MAX771ESA+T | 功能描述:DC/DC 開關控制器 5/12/15/AdjV Step Up DC/DC 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(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MAX771ESA-T | 功能描述:DC/DC 開關控制器 5/12/15/AdjV Step Up DC/DC 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(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MAX771MJA | 功能描述:DC/DC 開關控制器 5/12/15/AdjV Step Up DC/DC 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(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MAX77271EWL+T | 制造商:Maxim Integrated Products 功能描述:MULTIMODE PA STEP-DOWN CONVERTER WITH LINEAR BYPASS MODE FOR - Tape and Reel |
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