MP1471AGJ-Z
MP1471AGJ-Z is a high-efficiency synchronous step-down switching regulator manufactured by Monolithic Power Systems (MPS), integrated with internal high-side and low-side power MOSFETs for compact point-of-load power conversion. This part is marked NRND (Not Recommended for New Designs) by the manufacturer.
Suffix Definition
- MP1471A: Core product model with enhanced 3A output capability
- GJ: TSOT-23-6 surface-mount package specification
- -Z: Standard tape-and-reel packaging for automated SMT assembly; the suffix -P indicates tray packaging
1. Core Electrical Specifications
Input Parameters
- Wide operating input voltage range: 4.5 V ~ 16 V DC
- Integrated input under-voltage lockout (UVLO) to prevent unstable startup under insufficient input voltage
Output Parameters
- Continuous maximum output current: 3 A
- Adjustable output voltage range: 0.8 V ~ 14.72 V, configured via external feedback resistor divider
- Fixed switching frequency: 500 kHz, enabling smaller inductor and capacitor passive components
- Current-mode control architecture delivers fast load transient response and easy loop compensation
- Built-in internal soft-start circuit to suppress inrush current during power-up
- Auto AAM light-load power-saving mode to boost efficiency under light load conditions
- Internal power MOSFET Rds(on): 70 mΩ (high-side) / 150 mΩ (low-side), peak conversion efficiency up to 93%
2. Integrated Protection Mechanisms
- Over-Current Protection (OCP): Hiccup auto-recovery mode during output short-circuit; the device automatically restores normal operation after fault elimination without permanent damage
- Thermal Shutdown Protection (TSD): The chip shuts down when junction temperature exceeds 150°C, and restarts operation once temperature drops below 130°C
- Bootstrap UVLO protection for the floating high-side driver circuit
- Enable pin for external on/off control of the regulator
3. Package & Mechanical Information
- Package Type: 6-pin TSOT-23 thin surface-mount package
- Ultra-small outline for space-constrained PCB layouts
- Moisture Sensitivity Level: MSL 1, no strict dry-bag storage requirement before reflow soldering
4. Environmental & Compliance Standards
- Operating junction temperature range: -40 ℃ ~ +125 ℃
- Fully RoHS3 lead-free and halogen-free compliant, REACH SVHC compliant
- Excellent line and load regulation performance for industrial and embedded power systems
5. Typical Application Scenarios
- POL power rails for ARM MCU, FPGA, DSP and logic circuits in industrial control boards
- Auxiliary power supply for PLC, servo drives, communication modules and network equipment
- Portable test & measurement instruments, handheld electronic devices and battery-powered IoT nodes
- Automotive auxiliary ECU, on-board sensor and infotainment low-voltage power conversion
- Digital signage, POS terminals and small embedded single-board computer secondary power circuits
LXB Semicon supplies original MPS MP1471AGJ-Z 3A 16V input synchronous buck DC-DC regulator IC
