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参数资料
| 型号： | LM25119PSQX |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, QCC32 |
| 封装： | 5 X 5 MM, LLP-32 |
| 文件页数： | 19/24页 |
| 文件大小： | 694K |
| 代理商： | LM25119PSQX |
Pin
Name
Description
19
RAMP2
PWM ramp signal. An external resistor and capacitor connected between the SW2 pin, the RAMP2
pin and the AGND pin sets the channel2 PWM ramp slope. Proper selection of component values
produces a RAMP2 signal that emulates the current in the buck inductor.
20
CS2
Current sense amplifier input. Connect to the high side of the channel2 current sense resistor.
21
CSG2
Kelvin ground connection to the external current sense resistor. Connect directly to the low side of
the channel2 current sense resistor.
22
PGND2
Power ground return pin for low side MOSFET gate driver. Connect directly to the low side of the
channel2 current sense resistor.
23
LO2
Low side MOSFET gate drive output. Connect to the gate of the channel2 low-side synchronous
MOSFET through a short, low inductance path.
24
VCC2
Bias supply pin. Locally decouple to PGND2 using a low ESR/ESL capacitor located as close to
controller as possible.
25
SW2
Switching node of the buck regulator. Connect to channel2 bootstrap capacitor, the source terminal
of the high-side MOSFET and the drain terminal of the low-side MOSFET.
26
HO2
High side MOSFET gate drive output. Connect to the gate of the channel2 high-side MOSFET
through a short, low inductance path.
27
HB2
High-side driver supply for bootstrap gate drive. Connect to the cathode of the channel2 external
bootstrap diode and to the bootstrap capacitor. The bootstrap capacitor supplies current to charge
the high side MOSFET gate and should be placed as close to the controller as possible.
28
UVLO
Under-voltage lockout programming pin. If the UVLO pin is below 0.4V, the regulator will be in the
shutdown mode with all function disabled. If the UVLO pin is greater than 0.4V and below 1.25V, the
regulator will be in standby mode with the VCC regulators operational, the SS pins grounded and no
switching at the HO and LO outputs. If the UVLO pin voltage is above 1.25V, the SS pins are allowed
to ramp and pulse width modulated gate drive signals are delivered at the LO and HO pins. A 20A
current source is enabled when UVLO exceeds 1.25V and flows through the external UVLO resistors
to provide hysteresis.
29
VIN
Supply voltage input source for the VCC regulators.
30
HB1
High-side driver supply for bootstrap gate drive. Connect to the cathode of the channel1 external
bootstrap diode and to the bootstrap capacitor. The bootstrap capacitor supplies current to charge
the high side MOSFET gate and should be placed as close to controller as possible.
31
HO1
High side MOSFET gate drive output. Connect to the gate of the channel1 high-side MOSFET
through a short, low inductance path.
32
SW1
Switching node of the buck regulator. Connect to channel1 bootstrap capacitor, the source terminal
of the high-side MOSFET and the drain terminal of the low-side MOSFET.
EP
Exposed pad of LLP package. No internal electrical connections. Solder to the ground plane to reduce
thermal resistance.
www.national.com
4
LM25119
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM25119PSQX/NOPB | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| LM25119QPSQ/NOPB | 制造商:Texas Instruments 功能描述: 制造商:Texas Instruments 功能描述:IC REG CTRLR BUCK PWM CM 32-LLP 制造商:Texas Instruments 功能描述:LM25119QPSQ/NOPB |
| LM25119QPSQX/NOPB | 制造商:Texas Instruments 功能描述:IC REG CTRLR BUCK PWM CM 32-LLP 制造商:Texas Instruments 功能描述:Dual Synchronous Buck Controller |
| LM2512 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Mobile Pixel Link Level 0, 24-Bit RGB Display Interface Serializer with Dithering and Look Up Table Option |
| LM-2512 | 制造商:ROHM 制造商全称:Rohm 功能描述:16 x 32 matrix display |
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