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| 型號(hào)： | LM3370TL-2613/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.4 A DUAL SWITCHING CONTROLLER, 2400 kHz SWITCHING FREQ-MAX, PBGA20 |
| 封裝： | 3 X 2 MM, 0.60 MM HEIGHT, 0.50 MM PITCH, , MO-211DG, MICRO, SMD-20 |
| 文件頁(yè)數(shù)： | 1/26頁(yè) |
| 文件大?。?/td> | 5436K |
| 代理商： | LM3370TL-2613/NOPB |
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LM3370
August 25, 2011
Dual Synchronous Step-Down DC-DC Converter with
Dynamic Voltage Scaling Function
General Description
The LM3370 is a dual step-down DC-DC converter optimized
for powering ultra-low voltage circuits from a single Li-Ion bat-
tery and input rail ranging from 2.7V to 5.5V. It provides two
outputs with 600 mA load per channel. The output voltage
range varies from 1V to 3.3V and can be dynamically con-
trolled using the I2C-compatible interface. This dynamic volt-
age scaling function allows processors to achieve maximum
performance at the lowest power level. The I2C-compatible
interface can also be used to control auto PFM-PWM/PWM
mode selection and other performance enhancing features.
The LM3370 offers superior features and performance for
portable systems with complex power management require-
ments. Automatic intelligent switching between PWM low-
noise and PFM low-current mode offers improved system
efficiency. Internal synchronous rectification enhances the
converter efficiency without the use of further external de-
vices.
There is a power-on-reset function that monitors the level of
the output voltage to avoid unexpected power losses. The in-
dependent enable pin for each output allows for simple and
effective power sequencing.
LM3370 is available in a 4 mm by 5 mm 16-lead non-pullback
LLP and a 20-bump micro SMD, 3.0 mm x 2.0 mm x 0.6 mm,
package. A high switching frequency—2 MHz (typ)—allows
use of tiny surface-mount components including a 2.2 H in-
ductor.
Default fixed voltages for the 2 output voltages combination
can be customized to fit system requirements by contacting
National Semiconductor Corporation.
Features
■ I2C-compatible interface
— V
OUT1 = 1V to 2V in 50 mV steps
— V
OUT2 = 1.8V to 3.3V in 100 mV steps
— Automatic PFM/PWM mode switching & Forced PWM
mode for low noise operation
— Spread Spectrum capability using I2C
■ 600 mA load per channel
■ 2 MHz PWM fixed switching frequency (typ.)
■ The Bucks operate 180° out-of-phase timing offset for
noise and input surge current abatement
■ Internal synchronous rectification for high efficiency
■ Internal soft start
■ Power-on-reset function for both outputs
■ 2.7V ≤ V
IN ≤ 5.5V
■ Operates from a single Li-Ion cell or 3 cell NiMH/NiCd
batteries and 3.3V/5.5V fixed rails
■ 2.2 H Inductor, 4.7 F Input and 10 F Output Capacitor
per channel
■ 16-lead LLP Package (4 mm x 5 mm x 0.8 mm)
■ 20-bump micro SMD Package (3.0 mm x 2.0 mm x 0.6
mm)
Applications
■ Baseband Processors
■ Application Processors (Video, Audio)
■ I/O Power
■ FPGA Power and CPLD
Typical Performance Curve
20167381
2011 National Semiconductor Corporation
201673
www.national.com
LM3370
Dual
Synchronous
Step-Down
DC-DC
Converter
with
Dynamic
Voltage
Scaling
Function
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3370TL-3006 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual Synchronous Step-Down DC-DC Converter with Dynamic Voltage Scaling Function |
| LM3370TL-3006/NOPB | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM3370TL-3008 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual Synchronous Step-Down DC-DC Converter with Dynamic Voltage Scaling Function |
| LM3370TL-3008/NOPB | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM3370TL-3008EV | 功能描述:低壓差穩(wěn)壓器 - LDO LM3370 Eval Brd RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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