LTC1434
製造中止450mA, Low Noise Current Mode Step-Down DC/DC Converter
- 製品モデル
- 3
- 1Ku当たりの価格
- 価格は未定
製品の詳細
- High Efficiency: Up to 93%
- Constant Frequency Adaptive Power™ Operation
- Input Voltage Range: 3V to 13.5V
- Internal 0.6Ω Power Switch (VIN = 10V)
- Low Dropout Operation: 100% Duty Cycle
- Low-Battery Detector
- Internal Power-On Reset Timer
- Current Mode Operation for Excellent Line and Load Transient Response
- Low Quiescent Current: 470µA
- Shutdown Mode Draws Only 15µA Supply Current
- ±1% Reference Accuracy
- Available in 16- and 20-Lead Narrow SSOP
The LTC1433/LTC1434 are monolithic pulse width modulated step-down DC/DC converters. By utilizing current mode switching techniques, they provide excellent AC and DC load and line regulation. Both devices operate at a fixed frequency with the LTC1434 phase-lockable to an external clock signal.
Both devices incorporate two internal P-channel power MOSFETs with a parallel combined resistance of 0.6Ω (at a supply of 10V). The Adaptive Power output stage selectively drives one or both of the switches at frequencies up to 700kHz to reduce switching losses and maintain high efficiencies at low output currents.
The LTC1433/LTC1434 are capable of supplying up to 450mA of output current and boasts a ±2.4% output voltage accuracy. An internal low-battery detector has the same level of accuracy as the output voltage. A power-on reset timer (POR) is included which generates a signal delayed by 65536/fCLK (300ms typ) after the output is within 5% of the regulated output voltage.
Ideal for current sensitive applications, the devices draw only 470µA of quiescent current. In shutdown the devices draw a mere 15µA. To further maximize the life of the battery source, the internal P-channel MOSFET switch is turned on continuously in dropout.
Applications
- Cellular Telephones
- Portable Instruments
- Wireless Modems
- RF Communications
- Distributed Power Systems
- Scanners
- Battery-Powered Equipment
ドキュメント
データシート 2
信頼性データ 1
ユーザ・ガイド 1
アプリケーション・ノート 1
技術記事 1
| 製品モデル | ピン／パッケージ図 | 資料 | CADシンボル、フットプリント、および3Dモデル |
|---|---|---|---|
| LTC1434CGN#PBF | 20-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC1434CGN#TRPBF | 20-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC1434IGN#TRPBF | 20-Lead SSOP (Narrow 0.15 Inch) |
これは最新改訂バージョンのデータシートです。
ツールおよびシミュレーション
LTspice 1
下記製品はLTspiceで使用することが出来ます。:
- LTC1434
LTspice®は、無料で提供される強力で高速な回路シミュレータと回路図入力、波形ビューワに改善を加え、アナログ回路のシミュレーションを容易にするためのモデルを搭載しています。
評価用キット
LTC1434 | Low Noise, Current Mode PWM Step Down DC/DC 3.3V or 5V, 1A