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MAX17545
4.5V–42V, 1.7A, High-Efficiency, Synchronous Step-Down DC-DC Converter With Internal Compensation
Wide Input Voltage, 1.7A Internal FET Synchronous Buck Converter Ideal for Industrial Applications
Maxim Confidential 
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Parametric specs for Step-Down Switching Regulators
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 42 |
| VOUT1 (V) (min) | 0.9 |
| VOUT1 (V) (max) | 36 |
| IOUT1 (A) (max) | 1.7 |
| Switch Type | Internal |
| Output Adjust. Method | Resistor |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 2200 |
| Design Tools | EE-Sim |
| Package/Pins | TQFN-CU/20 |
| Budgetary Price (See Notes) | $1.57 @1k |
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参量
Parametric specs for Step-Down Switching Regulators
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 42 |
| VOUT1 (V) (min) | 0.9 |
| VOUT1 (V) (max) | 36 |
| IOUT1 (A) (max) | 1.7 |
| Switch Type | Internal |
| Output Adjust. Method | Resistor |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 2200 |
| Design Tools | generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=3121', '') |
| Package/Pins | TQFN-CU/20 |
| Budgetary Price (See Notes) | $1.57 @1k |
主要特征
- Reduces External Components and Total Cost
- No Schottky—Synchronous Operation
- Internal Compensation for Any Output Voltage
- Built-In Soft-Start
- All-Ceramic Capacitors, Compact Layout
- Reduces Number of DC-DC Regulators to Stock
- Wide 4.5V to 42V Input
- Adjustable 0.9V to 0.9 x VIN Output
- 100kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
- Reduces Power Dissipation
- Peak Efficiency > 90%
- PFM/DCM Enables Enhanced Light-load Efficiency
- 2.8µA Shutdown Current
- Operates Reliably in Adverse Industrial Environments
- Peak Current-Limit Protection
- Built-in Output Voltage Monitoring with Active-Low RESET
- Programmable EN/UVLO Threshold
- Monotonic Startup into Prebiased Load
- Overtemperature Protection
- High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range
应用/用途
- 基站电源
- 配电稳压器
- 通用负载点电源
- 高压单板系统
- 工业电源
描述
The MAX17545 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over 4.5V to 42V input. The converter can deliver up to 1.7A and generates output voltages from 0.9V up to 0.9 x VIN. The feedback (FB) voltage is accurate to within ±1.1% over -40°C to +125°C.
The MAX17545 uses peak-current-mode control. The device can be operated in pulse-width modulation (PWM), pulse-frequency modulation (PFM), or discontinuous conduction mode (DCM) control schemes.
The device is available in a 20-pin (4mm × 4mm) TQFN package. Simulation models are available.
The MAX17545 uses peak-current-mode control. The device can be operated in pulse-width modulation (PWM), pulse-frequency modulation (PFM), or discontinuous conduction mode (DCM) control schemes.
The device is available in a 20-pin (4mm × 4mm) TQFN package. Simulation models are available.
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