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參數(shù)資料
| 型號： | LM20333AMHX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 6 A SWITCHING REGULATOR, 240 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | TSSOP-20 |
| 文件頁數(shù)： | 1/6頁 |
| 文件大小： | 526K |
| 代理商： | LM20333AMHX |
January 15, 2009
LM20333A
36V, 3A Synchronous Buck Regulator with Frequency
Synchronization
General Description
The LM20333A is a full featured synchronous buck regulator
capable of delivering up to 3A of load current. The current
mode control loop is externally compensated with only two
components, offering both high performance and ease of use.
The device is optimized to work over the input voltage range
of 4.5V to 36V making it well suited for high voltage systems.
The device features internal Over Voltage Protection (OVP)
and Over Current Protection (OCP) circuits for increased sys-
tem reliability. A precision Enable pin and integrated UVLO
allows the turn on of the device to be tightly controlled and
sequenced. Startup inrush currents are limited by both an in-
ternally fixed and externally adjustable soft-start circuit. Fault
detection and supply sequencing are possible with the inte-
grated power good (PGOOD) circuit.
The LM20333A is designed to work well in multi-rail power
supply architectures. The output voltage of the device can be
configured to track a higher voltage rail using the SS/TRK pin.
If the output of the LM20333A is pre-biased at startup it will
not sink current to pull the output low until the internal soft-
start ramp exceeds the voltage at the feedback pin.
The switching frequency of the LM20333A can be synchro-
nized to an external clock by use of the SYNC pin. The SYNC
pin is capable of synchronizing to input signals ranging from
250 kHz to 1.5 MHz.
The LM20333A is offered in an exposed pad 20-pin eTSSOP
package that can be soldered to the PCB, eliminating the
need for bulky heatsinks.
Features
■ 4.5V to 36V input voltage range
■ 3A output current, 5.2A peak current
■ 130 m/110 m integrated power MOSFETs
■ 94% peak efficiency with synchronous rectification
■ 1.0% feedback voltage accuracy
■ Current mode control, selectable compensation
■ Oscillator synchronization from 250kHz to 1.5MHz
■ Adjustable output voltage down to 0.8V
■ Compatible with pre-biased loads
■ Programmable soft-start with external capacitor
■ Precision enable pin with hysteresis
■ OVP, UVLO inputs and PGOOD output
■ Internally protected with peak current limit, thermal
shutdown and restart
■ Accurate current limit minimizes inductor size
■ Non-linear current mode slope compensation
■ eTSSOP-20 exposed pad package
Applications
■ Simple to design, high efficiency point of load regulation
from a 4.5V to 36V bus
■ High Performance DSPs, FPGAs, ASICs and
Microprocessors
■ Communications Infrastructure, Automotive
Simplified Application Circuit
30077401
PowerWise is a registered trademark of National Semiconductor Corporation.
2009 National Semiconductor Corporation
300774
www.national.com
LM20333A
36V,
3A
Synchronous
Buck
Regulator
with
Frequency
Synchronization
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM20333EVAL | 功能描述:電源管理IC開發(fā)工具 LM20333 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 |
| LM20333EVAL/NOPB | 功能描述:電源管理IC開發(fā)工具 LM2033 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 |
| LM20333MH | 制造商:Texas Instruments 功能描述:Conv DC-DC Single Step Down 4.5V to 36V 20-Pin TSSOP EP Rail 制造商:Texas Instruments 功能描述:BUCK REG, 3A, ADJ, POWERWISE, 20TSSOP 制造商:Texas Instruments 功能描述:BUCK REG, 3A, ADJ, POWERWISE, 20TSSOP; Primary Input Voltage:36V; No. of Outputs:1; Output Voltage:32V; Output Current:3A; Voltage Regulator Case Style:TSSOP; No. of Pins:20; Operating Temperature Min:-40C; Operating Temperature ;RoHS Compliant: Yes |
| LM20333MH/NOPB | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 36V,3A SYNC BUCK REG 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(fēng)格:SMD/SMT |
| LM20333MHE | 制造商:Texas Instruments 功能描述:Conv DC-DC Single Step Down 4.5V to 36V 20-Pin TSSOP EP T/R 制造商:Texas Instruments 功能描述:Conv DC-DC Single Step Down 4.5V to 36V 20-Pin HTSSOP EP T/R 制造商:Texas Instruments 功能描述:BUCK REG, 3A, ADJ, POWERWISE, 20TSSOP; Primary Input Voltage:36V; No. of Outputs:1; Output Voltage:32V; Output Current:3A; Voltage Regulator Case Style:TSSOP; No. of Pins:20; Operating Temperature Min:-40C; Operating Temperature ;RoHS Compliant: Yes |
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