LM3253中文资料用于 2G/3G/4G 功率放大器的高电流降压直流/直流转换器数据手册TI规格书
| 厂商型号 |
LM3253 |
| 参数属性 | LM3253 封装/外壳为16-WFBGA，DSBGA；包装为卷带（TR）剪切带（CT）Digi-Reel® 得捷定制卷带；类别为集成电路（IC）的特殊用途稳压器；LM3253应用范围：转换器，RF 功率放大器；产品描述：IC REG CONV RF PWR 1OUT 16DSBGA |
| 功能描述 | 用于 2G/3G/4G 功率放大器的高电流降压直流/直流转换器 |
| 封装外壳 | 16-WFBGA，DSBGA |
| 制造商 | TI Texas Instruments |
| 中文名称 | 德州仪器 美国德州仪器公司 |
| 数据手册 | |
| 更新时间 | 2025-9-28 9:15:00 |
| 人工找货 | LM3253价格和库存，欢迎联系客服免费人工找货 |
LM3253规格书详情
描述 Description
The LM3253 is a DC-DC converter optimized for powering multi-mode 2G/3G/4G RF power amplifiers (PAs) from a single Lithium-Ion cell. The LM3253 steps down an input voltage from 2.7V to 5.5V to a dynamically adjustable output voltage of 0.4V to 3.6V. The output voltage is set through a VCON analog input that adjusts the output voltage to ensure efficient operation at all power levels of the RF PA. The LM3253 is optimized for USB datacard applications.
The LM3253 operates in constant frequency Pulse Width Modulation (PWM) mode producing a small and predictable amount of output voltage ripple. This enables best ECTEL power requirements in GMSK and EDGE spectral compliance, with the minimal amount of filtering and excess headroom. When operating in Pulse Frequency Modulation (PFM) mode, the LM3253 enables the lowest DG09 current consumption and therefore maximizes system efficiency.
The LM3253 has a unique Active Current assist and analog Bypass (ACB) feature to minimize inductor size without any loss of output regulation for the entire battery voltage and RF output power range, until dropout. ACB provides a parallel current path, when needed, to limit the maximum inductor current to 1.84A (typ.) while still driving a 3A load. The ACB also enables operation with minimal dropout voltage. The LM3253 is available in a small 2 mm x 2 mm chip-scale 16-bump DSBGA package.
When considering the use of the LM3253 in a system design, contact the Texas Instruments Sales or Field Application engineer for a copy of the \"LM3253:DC-DC Converter for 3G/4G RF PAs PCB Layout Considerations.”
特性 Features
• High-Efficiency PFM and PWM Modes with Internal Synchronous Rectification
• Dynamically Adjustable Output Voltage, 0.4V to 3.6V (typ.), in PFM and PWM modes
• 2.7MHz (average) PWM Switching Frequency
• Operates From a Single Li-ion Cell (2.7V to 5.5V)
• Minimum Total Solution Size by Using Small Footprint and Case Size Inductor and Capacitors
• Current and Thermal Overload Protection
技术参数
- 制造商编号
：LM3253
- 生产厂家
：TI
- Operating temperature range (°C)
：-30 to 90
- Topology
：Buck
- Type
：Converter
- Iout (max) (A)
：3
- Vin (min) (V)
：2.7
- Vin (max) (V)
：5.5
- Vout (min) (V)
：0.4
- Vout (max) (V)
：3.6
| 供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
|---|---|---|---|---|---|---|---|
TI/德州仪器 |
2450+ |
NA |
9850 |
只做原厂原装正品现货或订货假一赔十! |
询价 | ||
TI/德州仪器 |
23+ |
16-SMD |
3638 |
原装正品代理渠道价格优势 |
询价 | ||
TI/德州仪器 |
21+ |
DSBGA16 |
9990 |
只有原装 |
询价 | ||
TI/德州仪器 |
22+ |
N/A |
12245 |
现货,原厂原装假一罚十! |
询价 | ||
Texas Instruments(德州仪器) |
24+ |
SOIC-8 |
690000 |
代理渠道/支持实单/只做原装 |
询价 | ||
TI |
16+ |
DSBGA |
10000 |
原装正品 |
询价 | ||
Texas Instruments |
24+ |
16-μSMD (2.02x2.02) |
56300 |
一级代理/放心采购 |
询价 | ||
TI/德州仪器 |
21+ |
DSBGA16 |
9990 |
只有原装 |
询价 | ||
TI/德州仪器 |
25+ |
原厂封装 |
10280 |
询价 | |||
TI |
23+ |
16uSMD |
9000 |
原装正品，支持实单 |
询价 |
