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参数资料
| 型号： | LM3102EVAL/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 3/24页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR LM3102 |
| 标准包装： | 1 |
| 系列： | PowerWise®, SIMPLE SWITCHER® |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 3.3V |
| 电流 - 输出： | 2.5A |
| 输入电压： | 8 ~ 42 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 500kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板，文档 |
| 已用 IC / 零件： | LM3102 |
PIN DESCRIPTIONS
SNVS515G – SEPTEMBER 2007 – REVISED JANUARY 2012
Pin
1,9,10,12,19,2
Ball
Name
N/C
Description
No Connection
Application Information
These pins must be left unconnected.
0
2, 3
A2, A3, B2,
SW
Switching Node
Internally connected to the source of the main
B3, C2, C3,
D2, D3, D4
MOSFET and the drain of the Synchronous
MOSFET. Connect to the inductor.
4, 5
A4, B4
VIN
Input supply voltage
Supply pin to the device. Nominal input range is
4.5V to 42V.
6
C4
BST
Connection for bootstrap capacitor
Connect a 33 nF capacitor from the SW pin to this
pin. An internal diode charges the capacitor during
the main MOSFET off-time.
7
E3, E4, F1,
AGND
Analog Ground
Ground for all internal circuitry other than the
F2, F3, G3
PGND pin.
8
G2
SS
Soft-start
An 8 μA internal current source charges an
external capacitor to provide the soft- start function.
11
GND
Ground
Must be connected to the AGND pin for normal
operation. The GND and AGND pins are not
internally connected.
13
G1
FB
Feedback
Internally connected to the regulation and over-
voltage comparators. The regulation setting is 0.8V
at this pin. Connect to feedback resistors.
14
G4
EN
Enable
Connect a voltage higher than 1.26V to enable the
regulator. Leaving this input open circuit will enable
the device at internal UVLO level.
15
F4
RON
On-time Control
An external resistor from the VIN pin to this pin
sets the main MOSFET on-time.
16
E1, E2
VCC
Start-up regulator Output
Nominally regulated to 6V. Connect a capacitor of
not less than 680 nF between the VCC and AGND
pins for stable operation.
17, 18
A1, B1, C1,
PGND
Power Ground
Synchronous MOSFET source connection. Tie to a
D1
ground plane.
EP
EP
Exposed Pad
Thermal connection pad. Connect to the ground
plane.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Copyright ? 2007–2012, Texas Instruments Incorporated
Product Folder Links: LM3102
3
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM3102MH | 制造商:Texas Instruments 功能描述:IC, V REG, SYNCH, 2.5A, POWERWISE |
| LM3102MH/NOPB | 功能描述:直流/直流开关调节器 SYNC 1MHZ 2.5A STEP- DOWN VLTG REG RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| LM3102MHX | 制造商:Texas Instruments 功能描述:Conv DC-DC Single Step Down 4.5V to 42V 20-Pin TSSOP EP T/R |
| LM3102MHX/NOPB | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM3102QMH/NOPB | 功能描述:直流/直流开关调节器 SIMPLE SWITCHER Sync 1MHz 2.5A SD Vtg Reg RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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