LTC1735 High Efficiency Synchronous Step-Down Switching Regulator
The LTC®1735 is a synchronous step-down switching regulator controller that drives external N-channel power MOSFETs using a fixed frequency architecture. Burst Mode™ operation provides high efficiency at low load currents. The precision 0.8V reference is compatible with future generation microprocessors. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values.
The operating frequency (synchronizable up to 500kHz) is set by an external capacitor allowing maximum flexibility in optimizing efficiency. A forced continuous control pin reduces noise and RF interference and can assist secondary winding regulation by disabling Burst Mode operation when the main output is lightly loaded.
Protection features include internal foldback current limiting, output overvoltage crowbar and optional shortcircuit shutdown. Soft-start is provided by an external capacitor that can be used to properly sequence supplies. The operating current level is user-programmable via an external current sense resistor. Wide input supply range allows operation from 4V to 30V (36V maximum).
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LTC1735 订购信息和价格参考Package Variations and Pricing
| 器件型号 | 封装 | 引脚 | 温度 | 价格 (以 1 ~ 99 片为批量) | 价格 (以 1000 片为批量) * |
| LTC1735CF | TSSOP | 20 | C | $3.91 | $3.30 |
| LTC1735CF#PBF | TSSOP | 20 | C | $3.91 | $3.30 |
| LTC1735CF#TR | TSSOP | 20 | C | $3.42 | |
| LTC1735CF#TRPBF | TSSOP | 20 | C | $3.42 | |
| LTC1735CGN | SSOP | 16 | C | $3.80 | $3.25 |
| LTC1735CGN#PBF | SSOP | 16 | C | $3.80 | $3.25 |
| LTC1735CGN#TR | SSOP | 16 | C | $3.31 | |
| LTC1735CGN#TRPBF | SSOP | 16 | C | $3.31 | |
| LTC1735CGN-1 | SSOP | 16 | C | $3.80 | $3.25 |
| LTC1735CGN-1#PBF | SSOP | 16 | C | $3.80 | $3.25 |
| LTC1735CGN-1#TR | SSOP | 16 | C | $3.31 | |
| LTC1735CGN-1#TRPBF | SSOP | 16 | C | $3.31 | |
| LTC1735CS | SO | 16 | C | $3.65 | $3.10 |
| LTC1735CS#PBF | SO | 16 | C | $3.65 | $3.10 |
| LTC1735CS#TR | SO | 16 | C | $3.16 | |
| LTC1735CS#TRPBF | SO | 16 | C | $3.16 | |
| LTC1735CS-1 | SO | 16 | C | $3.65 | $3.10 |
| LTC1735CS-1#PBF | SO | 16 | C | $3.65 | $3.10 |
| LTC1735CS-1#TR | SO | 16 | C | $3.16 | |
| LTC1735CS-1#TRPBF | SO | 16 | C | $3.16 | |
| LTC1735EGN | SSOP | 16 | E | $4.25 | $3.60 |
| LTC1735EGN#PBF | SSOP | 16 | E | $4.25 | $3.60 |
| LTC1735EGN#TR | SSOP | 16 | E | $3.66 | |
| LTC1735EGN#TRPBF | SSOP | 16 | E | $3.66 | |
| LTC1735IF | TSSOP | 20 | I | $6.52 | $4.30 |
| LTC1735IF#PBF | TSSOP | 20 | I | $6.52 | $4.30 |
| LTC1735IF#TR | TSSOP | 20 | I | $4.42 | |
| LTC1735IF#TRPBF | TSSOP | 20 | I | $4.42 | |
| LTC1735IGN | SSOP | 16 | I | $5.05 | $4.25 |
| LTC1735IGN#PBF | SSOP | 16 | I | $5.05 | $4.25 |
| LTC1735IGN#TR | SSOP | 16 | I | $4.31 | |
| LTC1735IGN#TRPBF | SSOP | 16 | I | $4.31 | |
| LTC1735IGN-1 | SSOP | 16 | I | $5.05 | $4.25 |
| LTC1735IGN-1#PBF | SSOP | 16 | I | $5.05 | $4.25 |
| LTC1735IGN-1#TR | SSOP | 16 | I | $4.31 | |
| LTC1735IGN-1#TRPBF | SSOP | 16 | I | $4.31 | |
| LTC1735IS | SO | 16 | I | $4.90 | $4.05 |
| LTC1735IS#PBF | SO | 16 | I | $4.90 | $4.05 |
| LTC1735IS#TR | SO | 16 | I | $4.11 | |
| LTC1735IS#TRPBF | SO | 16 | I | $4.11 | |
| LTC1735IS-1 | SO | 16 | I | $4.90 | $4.05 |
| LTC1735IS-1#PBF | SO | 16 | I | $4.90 | $4.05 |
| LTC1735IS-1#TR | SO | 16 | I | $4.11 | |
| LTC1735IS-1#TRPBF | SO | 16 | I | $4.11 |
LTC1735 数据手册及相关资料下载
- 数据手册(英文) : LTC1735 - High Efficiency Synchronous Step-Down Switching Regulator.PDF
- 数据手册(中文) : LTC1735 - High Efficiency Synchronous Step-Down Switching Regulator.PDF
- 应用指南 (英文) : AN76 - OPTI-LOOP Architecture Reduces Output Capacitance and Improves Transient Response.PDF
- 设计要点(英文) : Design Solutions 10 - Active Voltage Positioning Reduces Output Capacitors.PDF
- 设计要点 (英文) : DN199 - LTC1735 Provides Low Cost, Efficient Mobile CPU Power.PDF
- 设计要点 (英文) : DN209 - 2-Step Voltage Regulation Improves Performance and Decreases CPU Temperature in Portable Computers.PDF
- 设计要点 (英文) : DN279 - Microprocessor Core Supply Voltage Set by I2C Bus Without VID Lines.PDF
- 可靠性数据 : R384 Reliability Data .PDF
