Create a design and simulate using EE-Sim tools: MAX17501EATB+
The MAX17501EATB+ high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 60V input voltage range. This device is offered in a fixed 3.3V , 5V or adjustable output voltage (0.9V to 92%VIN) while delivering up to 500mA of current. The output voltage is accurate to within ±1.7% over -40°C to +125°C. The MAX17501EATB+ is available in a compact TDFN package. Simulation models are available.
The device features peak-current-mode control with pulse-width modulation (PWM). Users can choose devices with either pulse frequency modulation (PFM) or forced PWM scheme. PFM devices skip pulses at light load for higher efficiency, while forced-PWM devices operate with fixed switching frequency at any load for noise sensitive-applications. The low-resistance, on-chip MOSFETs ensure high efficiency at full load and simplify the layout.
A programmable soft-start feature allows users to reduce input inrush current. The device also incorporates an output enable/undervoltage lockout pin (EN/UVLO) that allows the user to turn on the part at the desired input-voltage level. An open-drain active-low RESET pin provides a delayed power-good signal to the system upon achieving successful regulation of the output voltage.
Feature
- Eliminates External Components and Reduce Total Cost
- No Schottky-Synchronous Operation for High Efficiency and Reduced Cost
- Internal Compensation and Feedback Divider for 3.3V and 5V Fixed Outputs
- All-Ceramic Capacitors, Ultra-Compact Layout
- Reduces Number of DC-DC Regulators to Stock
- Wide 4.5V to 60V Input Voltage Range
- 0.9V to 92%VIN Adjustable Output Voltage
- Delivers up to 500mA
- 600kHz and 300kHz Switching Frequency Options
- Available in a 10-Pin, 3mm x 2mm TDFN Package
- Reduces Power Dissipation
- Peak Efficiency > 90%
- PFM Feature for High Light-Load Efficiency
- Shutdown Current = 0.9μA (typ)
- Operates Reliably in Adverse Industrial Environments
- Hiccup-Mode Current Limit, Sink Current Limit, and Autoretry Startup
- Built-In Output-Voltage Monitoring (Open-Drain Active-Low RESET Pin)
- Resistor-Programmable EN/UVLO Threshold
- Adjustable Soft-Start and Prebiased Power-Up
- High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range
Applications
- Base Station, VOIP, Telecom
- Battery-Powered Equipment
- General-Purpose Point-of-Load
- Home Theater
- HVAC and Building Control
- Industrial Process Control
