The MP1495DJ-LF-Z from Monolithic Power Systems is a high-efficiency synchronous step-down DC/DC converter operating from a 4.5V to 16V input range and delivering up to 3A continuous output current. The output is adjustable from 0.8V, making the device suitable for notebook I/O power, set-top boxes, displays, and distributed power systems.
The converter uses fixed-frequency peak-current-mode control and integrates both high-side and low-side power MOSFETs. Typical on-resistance is 80mΩ for the high-side MOSFET and 30mΩ for the low-side MOSFET, helping reduce external component count and conduction losses.
The internal oscillator operates at 500kHz typical, with a specified 440kHz-to-580kHz range. The EN/SYNC pin supports synchronization to an external clock from 200kHz to 2MHz. Maximum duty cycle is approximately 95% typical, and minimum on-time is about 60ns.
For improved light-load efficiency, the MP1495 provides Advanced Asynchronous Modulation (AAM) power-save operation. The AAM threshold can be programmed to balance efficiency, ripple, transient response, and stability, while driving the AAM pin high forces continuous-conduction mode.
The device uses an approximately 807mV feedback reference, with output voltage adjustable from 0.8V. Typical quiescent current is 0.5mA, while shutdown supply current is 1µA maximum. An integrated 1.5ms soft-start limits start-up stress and output overshoot.
Integrated protection includes cycle-by-cycle current limiting, hiccup overcurrent protection, undervoltage lockout, and thermal shutdown. Current limit is approximately 5A typical, while thermal shutdown occurs at approximately 150°C, with about 20°C of thermal hysteresis.
The exact MP1495DJ-LF-Z is supplied in an 8-pin TSOT-23 package and has a recommended operating junction-temperature range of -40°C to +125°C. The -LF suffix identifies the RoHS-compliant version, while -Z specifies tape-and-reel packaging.
MPS currently marks the MP1495 family as NRFND — Not Recommended for New Designs and points designers toward MP1477 as an alternative. The exact MP1495DJ-LF-Z ordering code remains listed on the official MP1495 page, but it should be treated as a legacy design part rather than a preferred choice for new products.
Key Specifications:
- Brand: Monolithic Power Systems / MPS
- Part Number: MP1495DJ-LF-Z
- Product Type: Synchronous Step-Down Converter
- Topology: Synchronous Buck
- Control Mode: Peak Current Mode
- Input Voltage: 4.5V to 16V
- Continuous Output Current: 3A
- Adjustable Output Voltage: From 0.8V
- Feedback Voltage: 807mV Typ
- Switching Frequency: 500kHz Typ
- Oscillator Range: 440kHz to 580kHz
- External Synchronization: 200kHz to 2MHz
- High-Side MOSFET RDS(on): 80mΩ Typ
- Low-Side MOSFET RDS(on): 30mΩ Typ
- Maximum Duty Cycle: 95% Typ
- Minimum On-Time: 60ns
- Current Limit: 5A Typ / 4.2A Min
- Quiescent Current: 0.5mA Typ
- Shutdown Current: 1µA Max
- AAM Power-Save Mode: Yes
- Forced CCM: Supported
- Internal Soft-Start: Yes
- Soft-Start Time: 1.5ms Typ
- Cycle-by-Cycle OCP: Yes
- Hiccup Protection: Yes
- UVLO: Yes
- UVLO Rising Threshold: 3.9V Typ
- Thermal Shutdown: Yes
- Thermal Shutdown Threshold: 150°C Typ
- Thermal Hysteresis: 20°C Typ
- Operating Junction Temperature: -40°C to +125°C
- Maximum Junction Temperature: 150°C
- Package: TSOT-23-8
- Pin Count: 8
- Mounting Type: SMD / SMT
-LF: RoHS-Compliant Version-Z: Tape & Reel- Lifecycle Status: NRFND / Not Recommended for New Designs
- Recommended Alternative for New Designs: MP1477.
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