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参数资料
| 型号： | LM3370TLX-2613/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.4 A DUAL SWITCHING CONTROLLER, 2400 kHz SWITCHING FREQ-MAX, PBGA20 |
| 封装： | 3 X 2 MM, 0.60 MM HEIGHT, 0.50 MM PITCH, , MO-211DG, MICRO, SMD-20 |
| 文件页数： | 1/26页 |
| 文件大小： | 5436K |
| 代理商： | LM3370TLX-2613/NOPB |
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
相关PDF资料 |
PDF描述 |
|---|---|
| LM3370TL-2613/NOPB | 1.4 A DUAL SWITCHING CONTROLLER, 2400 kHz SWITCHING FREQ-MAX, PBGA20 |
| LM3420A12.6MDA | 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC |
| LM3420A-8.2MWA | 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC |
| LM3420A-4.2MWA | 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC |
| LM3420A-4.2MDA | 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM3370TLX-3006 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Dual Synchronous Step-Down DC-DC Converter with Dynamic Voltage Scaling Function |
| LM3370TLX-3006/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 |
| LM3370TLX-3008 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Dual Synchronous Step-Down DC-DC Converter with Dynamic Voltage Scaling Function |
| LM3370TLX-3008/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 |
| LM3370TLX-3022 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Dual Synchronous Step-Down DC-DC Converter with Dynamic Voltage Scaling Function |
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