參數(shù)資料
型號(hào)： MAX770
廠商： Maxim Integrated Products, Inc.
英文描述： 5V/12V/15V or Adjustable, High-Efficiency, Low IQ, Step-Up DC-DC Controllers
中文描述： 5V/12V/15V或可調(diào)、高效率、低IQ、升壓型DC-DC控制器
文件頁(yè)數(shù)： 7/20頁(yè)
文件大?。?/td> 204K
代理商： MAX770
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
相關(guān)PDF資料
PDF描述
MAX773CPD Quadruple 2-Input Positive-AND Gates 14-CDIP -55 to 125
MAX773CSD Quadruple 2-Input Positive-AND Gates 14-CFP -55 to 125
MAX773EPD Quadruple 2-Input Positive-AND Gates 14-CDIP -55 to 125
MAX773ESD Quadruple 2-Input Positive-AND Gates 20-LCCC -55 to 125
MAX773MJD Quadruple 2-Input Positive-AND Gates 14-CDIP -55 to 125
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX7705CPA 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel
MAX7705CPA+ 功能描述:監(jiān)控電路 uPower P-Supply Monitor RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel
MAX7705CSA 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel
MAX7705CSA+ 功能描述:監(jiān)控電路 uPower P-Supply Monitor RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel
MAX7705CSA+T 功能描述:監(jiān)控電路 uPower P-Supply Monitor RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel
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