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主要特征
应用/用途
Parametric specs for Step-Down Switching Regulators
| VIN (V) (min) | 4 |
| VIN (V) (max) | 16 |
| VOUT1 (V) (min) | 1.25 |
| VOUT1 (V) (max) | 16 |
| IOUT1 (A) (max) | 0.75 |
| Switch Type | Internal |
| Output Adjust. Method | Resistor |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 190 |
| Package/Pins | PDIP/8 SOIC (W)/16 |
| Budgetary Price (See Notes) | 3.76 |
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参量
Parametric specs for Step-Down Switching Regulators
| VIN (V) (min) | 4 |
| VIN (V) (max) | 16 |
| VOUT1 (V) (min) | 1.25 |
| VOUT1 (V) (max) | 16 |
| IOUT1 (A) (max) | 0.75 |
| Switch Type | Internal |
| Output Adjust. Method | Resistor |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 190 |
| Package/Pins | PDIP/8 SOIC (W)/16 |
| Budgetary Price (See Notes) | 3.76 |
主要特征
- Up to 750mA Load Currents
- 160kHz High-Frequency, Current-Mode PWM
- 85% to 96% Efficiencies
- 33µH or 100µH Pre-Selected Inductor Value, No Component Design Required
- 1.7mA Quiescent Supply Current
- 6µA Shutdown Supply Current
- Adjustable Output Voltage
- Overcurrent, Soft-Start, and Undervoltage Lockout Protection
- Cycle-by-Cycle Current Limiting
- 8-Pin DIP/SO Packages (MAX750A)
应用/用途
- 蜂窝电话
- 计算机外设
- 便携式通信设备
- 便携式仪表
描述
The MAX750A/MAX758A are adjustable-output, CMOS, step-down, DC-DC switching regulators. The MAX758A accepts inputs from 4V to 16V and delivers 750mA, while the MAX750A accepts inputs from 4V to 11V and delivers 450mA. Typical efficiencies are 85% to 90%. Typical quiescent current is 1.7mA, or only 6µA in shutdown mode. The output does not exhibit any ripple at subharmonics of the switching frequency over its specified range.
Pulse-width-modulation (PWM) current-mode control provides precise output regulation and excellent transient responses. Output voltage accuracy is guaranteed to be ±4.5% plus feedback-resistor tolerance over line, load, and temperature variations. Fixed-frequency switching and absence of subharmonic ripple allows easy filtering of output ripple and noise, as well as the use of small external components. These regulators require only a single inductor value to work in most applications, so no inductor design is necessary.
Pulse-width-modulation (PWM) current-mode control provides precise output regulation and excellent transient responses. Output voltage accuracy is guaranteed to be ±4.5% plus feedback-resistor tolerance over line, load, and temperature variations. Fixed-frequency switching and absence of subharmonic ripple allows easy filtering of output ripple and noise, as well as the use of small external components. These regulators require only a single inductor value to work in most applications, so no inductor design is necessary.
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