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參數(shù)資料
| 型號： | LM25010 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 42V, 1.0A Step-Down Switching Regulator |
| 中文描述： | 42V的1.0安培降壓型開關(guān)穩(wěn)壓器 |
| 文件頁數(shù)： | 3/17頁 |
| 文件大?。?/td> | 776K |
| 代理商： | LM25010 |
Pin Descriptions
Pin Number
LLP-10
1
Name
SW
Description
Application Information
TSSOP-14
2
Switching Node
Internally connected to the buck switch source.
Connect to the inductor, free-wheeling diode, and
bootstrap capacitor.
Connect a capacitor from SW to the BST pin. The
capacitor is charged from VCC via an internal diode
during the buck switch off-time.
During the buck switch off-time, the inductor current
flows through the internal sense resistor, and out of
the ISEN pin to the free-wheeling diode. The current
limit comparator keeps the buck switch off if the
ISEN current exceeds 1.25A (typical).
Re-circulating current flows into this pin to the
current sense resistor.
Ground return for all internal circuitry other than the
current sense resistor.
Input to both the regulation and over-voltage
comparators. The FB pin regulation level is 2.5V.
An internal 11.5 μA current source charges the SS
pin capacitor to 2.5V to soft-start the reference input
of the regulation comparator.
An external resistor from VIN to the RON/SD pin
sets the buck switch on-time. Grounding this pin
shuts down the regulator.
The voltage at VCC is nominally equal to V
IN
for V
IN
<
8.9V, and regulated at 7V for V
IN
>
8.9V.
Connect a 0.47 μF, or larger capacitor from VCC to
ground, as close as possible to the pins. An external
voltage can be applied to this pin to reduce internal
dissipation if V
IN
is greater than 8.9V. MOSFET
body diodes clamp VCC to VIN if V
CC
>
V
IN
.
Nominal input range is 6V to 42V. Input bypass
capacitors should be located as close as possible to
the VIN pin and RTN pins.
No internal connection. Can be connected to ground
plane to improve heat dissipation.
Exposed metal pad on the underside of the device.
It is recommended to connect this pad to the PC
board ground plane to aid in heat dissipation.
2
3
BST
Boost pin for bootstrap capacitor
3
4
ISEN
Current sense
4
5
SGND
Current Sense Ground
5
6
RTN
Circuit Ground
6
9
FB
Voltage feedback input from the
regulated output
Softstart
7
10
SS
8
11
RON/SD
On-time control and shutdown
9
12
VCC
Output of the bias regulator
10
13
VIN
Input supply voltage
1,7,8,14
NC
No connection.
EP
Exposed Pad
L
www.national.com
3
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相關(guān)代理商/技術(shù)參數(shù) |
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| LM25010_08 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:42V, 1.0A Step-Down Switching Regulator |
| LM25010EVAL | 功能描述:電源管理IC開發(fā)工具 LM25010 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LM25010MH | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM25010MH/NOPB | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 42V,1.0A STEP-DOWN SWITCHING REG RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| LM25010MHX | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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