Brief Description

The ZSPM4011 is a DC/DC synchronous switching regulator with fully integrated power switches, internal compensation, and full fault protection.  The switching frequency of 1MHz enables the use of small filter components, resulting in reduced board space and reduced BOM costs.

The ZSPM4011 utilizes current mode feedback in normal regulation PWM mode.  When the regulator is disabled (EN is low), the device draws less than 10uA quiescent current.

The ZSPM4011 integrates a wide range of protection circuitry, including: input supply under-voltage lockout, output voltage soft start, current limit, and thermal shutdown.

The ZSPM4011 includes supervisory reporting through the PG (Power Good) open drain output to interface other components in the system.

Features

• Fixed output voltages: 1.5V, 1.8V, 2.5V, 3.3V, and 5V with +/- 2% output tolerance
• Adjustable version output voltage range: 0.9V to 5V with +/- 1.5% reference
• Wide input voltage range: 
6V to 24V (26.4V Abs Max)
• 1MHz +/- 10% fixed switching frequency
• 1A continuous output current: 
High efficiency – up to 95%
• Current mode PWM control with PFM mode for improved light load efficiency
• Voltage supervisor for VOUT reported at the PG pin
• Input supply under voltage lockout
• Soft start for controlled startup with no overshoot
• Full protection for over-current, over-temperature, and VOUT over-voltage
• Less than 10uA in shutdown mode
• Low external component count

Benefits

• Increased battery life
• Minimal external component count (3 capacitors, 1 inductor)
• Inherent fault protection and reporting  


Applications

• Wireless Access points, cable modems
• Set-top Box, DVD, LCD, LED supply
• Portable: GPS, smart phones, tablet PCs
• Printers

Available Support

• Evaluation kit
• Datasheets

Physical Characteristics

• Junction operating temperature -40°C to 125°C
• Packaged in a 16pin QFN (3x3)