MP4420
Synchronous Step-Down ConverterThe MP4420 is a synchronous step-down converter from Monolithic Power Systems. View the full MP4420 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
Official MP4420 datasheet (PDF) — the source this page was extracted from.
MP4420 Key Specifications
| Parameter | Value |
|---|---|
| Case/Package | VSSOP |
| Output Current | 2A |
| Switching Frequency | 410kHz |
| Function | Step-Down |
| Height - Seated (Max) | 1 mm |
| Introduction Date | 2025-04-02 |
| Length | 2.9 mm |
| Lifecycle Status | Production (Last Updated: 2 years ago) |
| Manufacturer Lifecycle Status | ACTIVE (Last Updated: 2 years ago) |
| Max Input Voltage | 30 V |
| Max Operating Temperature | 125 °C |
| Max Output Current | 2 A |
| Max Output Voltage | 27 V |
| Max Switching Frequency | 500 kHz |
| Min Input Voltage | 4 V |
| Min Operating Temperature | -40 °C |
| Min Output Voltage | 800 mV |
| Mount | Surface Mount |
| Mounting Type | Surface Mount |
| Nominal Input Voltage | 12 V |
| Number of Circuits | 1 |
| Number of Outputs | 1 |
| Number of Outputs | 1 |
| Number of Terminals | 8 |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Output Configuration | Positive |
| Output Configuration | Positive |
| Output Current | 2 A |
| Output Type | Adjustable |
| Output Type | Adjustable |
| Package / Case | SOT-23-8 Thin, TSOT-23-8 |
| Packaging | MouseReel |
| REACH SVHC | Unaffected |
| RoHS | Compliant |
| Standard Pack Qty | 500 |
| Supplier Device Package | TSOT-23-8 |
| Switching Frequency | 410 kHz |
| Synchronous Rectifier | Yes |
| Synchronous Rectifier | Yes |
| Terminal Pitch | 650 µm |
| Topology | Buck |
| Topology | Buck |
| Input Voltage (Max) | 30V |
| Input Voltage (Min) | 4V |
| Output Voltage (Max) | 27V |
| Output Voltage | 0.8V |
| Width | 1.6 mm |
MP4420 Overview
Part: MP4420GJ — Monolithic Power Systems (MPS)
Type: Synchronous Step-Down (Buck) Converter
Description: 4–30 V continuous input (36 V transient), 2 A synchronous buck converter with 90 mΩ/55 mΩ integrated MOSFETs, 410 kHz default switching frequency and adjustable output from 0.8 V.
Operating Conditions:
- Supply voltage: 4–30 V continuous (36 V input transient tolerance)
- Operating junction temperature: -40 to +125 °C
- Output voltage: 0.8 V to 0.9×VIN
- External sync clock: 200 kHz to 2.2 MHz
Absolute Maximum Ratings:
- Max supply voltage (VIN): 40 V
- VSW: -0.3 to 41 V
- VBS: VSW + 6 V
- All other pins: -0.3 to 6 V
- Continuous power dissipation (TA = +25 °C, TSOT23-8): 1.25 W
- Max junction temperature: 150 °C
- Storage temperature: -65 to 150 °C
- Lead temperature: 260 °C
Key Specs:
- Feedback voltage: 780 / 792 / 804 mV (min/typ/max)
- Quiescent supply current: 0.5 mA typ, 0.7 mA max (VEN = 2 V, VFB = 1 V)
- Shutdown supply current: 8 μA max (VEN = 0 V)
- HS/LS switch on-resistance: 90 mΩ typ (105 mΩ max) / 55 mΩ typ (75 mΩ max)
- Current limit: 3.2 / 4.2 / 5.3 A (min/typ/max, under 40% duty cycle)
- Oscillator frequency: 410 kHz typ (320–500 kHz, VFB = 750 mV)
- Maximum duty cycle: 95% typ (92% min)
- VIN UVLO: 3.5 V rising typ, 3.3 V falling typ
- Soft-start time: 1.45 ms typ (VOUT 10% to 90%)
- Thermal shutdown: 170 °C typ, 30 °C hysteresis (bench characterization)
- (VIN = 12 V, TJ = +25 °C unless otherwise noted)
Features:
- Wide 4–30 V continuous input range with 36 V automotive load-dump tolerance
- High-efficiency synchronous mode operation
- Synchronizes to an external clock of 200 kHz to 2.2 MHz
- High duty cycle for automotive cold-crank
- Internal soft-start
- Power-save mode
- Power Good output
- Over-current protection with hiccup
- Thermal shutdown
- Output adjustable from 0.8 V
Applications:
- Automotive
- Distributed power systems
- Industrial control systems
Package:
- TSOT23-8 (8-pin)
MP4420 Features
- Wide 4V to 30V Continuous Operating Input Range
- 36V Input Transient Tolerance for Automotive Load Dump
- 90m Ω /55m Ω Low RDS(ON) Internal Power MOSFETs
- High-Efficiency Synchronous Mode Operation
- Default 410kHz Switching Frequency
- Synchronizes to a 200kHz to 2.2MHz External Clock
- High Duty Cycle for Automotive Cold-crank
- Internal Soft-Start
- Power-Save Mode
- Power Good
- Thermal Shutdown
- OCP Protection and Hiccup
- Output Adjustable from 0.8V
- Available in an 8-pin TSOT-23 package
MP4420 Applications
- Automotive
- Distributed Power Systems
- Industrial Control System
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. 'MPS' and 'The Future of Analog IC Technology' are Registered Trademarks of Monolithic Power Systems, Inc.
MP4420 Pin Configuration
| Package Pin # | Name | Description |
|---|---|---|
| 1 | PG | Power Good. The output of this pin is an open drain and goes high if the output voltage exceeds 90% of the nominal voltage. |
| 2 | IN | Supply Voltage. The MP4420 operates from a 4V to 30V input rail. Requires C1 to decouple the input rail. Connect using a wide PCB trace. |
| 3 | SW | Switch Output. Connect using a wide PCB trace. |
| 4 | GND | System Ground. This pin is the reference ground of the regulated output voltage, and PCB layout requires special care. For best results, connect to GND with copper traces and vias. |
| 5 | BST | Bootstrap. Requires a capacitor connected between SW and BST pins to form a floating supply across the high-side switch driver. A 20 Ω resistor placed between SW and BST cap is strongly recommended to reduce SW spike voltage. |
| 6 | EN/SYNC | Enable/Synchronize. EN high to enable the MP4420. Apply an external clock to the EN pin to change the switching frequency. |
| 7 | VCC | Bias Supply. Decouple with 0.1 μ F-to-0.22 μ F capacitor. Select a capacitor that does not exceed 0.22 μ F. |
| 8 | FB | Feedback. Connect to the tap of an external resistor divider from the output to GND, to set the output voltage. The frequency fold-back comparator lowers the oscillator frequency when the FB voltage is below 660mV to prevent current limit runaway during a short-circuit fault condition. |
MP4420 Electrical Characteristics
VIN = 12V, TJ = +25°C, unless otherwise noted.
| Parameter | Symbol | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Supply Current (Shutdown) | I SHDN | V EN = 0V | 8 | μ A | ||
| Supply Current (Quiescent) | I Q | V EN = 2V, V FB = 1V | 0.5 | 0.7 | mA | |
| HS Switch-ON Resistance | R ON_HS | V BST-SW =5V | 90 | 105 | m Ω | |
| LS Switch-ON Resistance | R ON_LS | V CC =5V | 55 | 75 | m Ω | |
| Switch Leakage | I LKG SW | V EN = 0V, V SW =12V | 1 | μ A | ||
| Current Limit | I LIMIT | Under 40% Duty Cycle | 3.2 | 4.2 | 5.3 | A |
| Oscillator Frequency | f SW | V FB =750mV | 320 | 410 | 500 | kHz |
| Fold-Back Frequency | f FB | V FB <400mV | 70 | 100 | 130 | kHz |
| Maximum Duty Cycle | D MAX | V FB =750mV, 410kHz | 92 | 95 | % | |
| Minimum ON Time (5) | t ON MIN | 70 | ns | |||
| Sync Frequency Range | f SYNC | 0.2 | 2.4 | MHz | ||
| Feedback Voltage | V FB | 780 | 792 | 804 | mV | |
| Feedback Current | I FB | V FB =820mV | 10 | 100 | nA | |
| EN Rising Threshold | V EN RISING | 1.15 | 1.4 | 1.65 | V | |
| EN Falling Threshold | V EN FALLING | 1.05 | 1.25 | 1.45 | V | |
| EN Threshold Hysteresis | V EN_HYS | 150 | mV | |||
| EN Input Current | I EN | V EN =2V | 4 | 6 | μ A | |
| V EN =0 | 0 | 0.2 | μ A | |||
| VIN Under-Voltage Lockout Threshold-Rising | INUV RISING | 3.3 | 3.5 | 3.7 | V | |
| VIN Under-Voltage Lockout Threshold-Falling | INUV FALLING | 3.1 | 3.3 | 3.5 | V | |
| VIN Under-Voltage Lockout Threshold-Hysteresis | INUV HYS | 200 | mV | |||
| VCC Regulator | V CC | I CC =0mA | 4.6 | 4.9 | 5.2 | V |
| VCC Load Regulation | I CC =5mA | 1.5 | 4 | % | ||
| Soft-Start Period | t SS | V OUT from 10% to 90% | 0.55 | 1.45 | 2.45 | ms |
| Thermal Shutdown (5) | 150 | 170 | °C | |||
| Thermal Hysteresis (5) | 30 | °C | ||||
| PG Rising Threshold | PG Vth RISING | as percentage of V FB | 86.5 | 90 | 93.5 | % |
| PG Falling Threshold | PG Vth FALLING | as percentage of V FB | 80.5 | 84 | 87.5 | % |
MP4420 Absolute Maximum Ratings
| V IN | ................................................ -0.3V to 40V |
|---|---|
| V SW ................................................ | -0.3V to 41V |
| V BS ....................................................... | V SW +6V |
| All Other Pins................................-0.3V | to 6V (2) |
| Continuous Power Dissipation (T A = +25°C) | (3) |
| TSOT23-8................................................1.25W | |
| Junction Temperature..............................150°C | |
| Lead Temperature | ...................................260°C |
| Storage Temperature.................-65°C | to 150°C |
Recommended Operating Conditions Continuous Supply Voltage VIN .......... 4V to 30V Output Voltage VOUT ................... 0.8V to 0.9xV IN Operating Junction Temp. (TJ). -40°C to +125°C
Thermal Resistance (4) θ JA θ JC TSOT23-8 ............................. 100 ..... 55 ... °C/W
MP4420 Thermal Information
Thermal shutdown prevents the chip from operating at exceedingly high temperatures. When the silicon die temperature exceeds 170°C, it shuts down the whole chip. When the temperature drops below its lower threshold (typically 140°C) the chip is enabled again.
MP4420 Typical Application
MP4420 Package Information
TOP VIEW
Variants on the same datasheet
These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.
| Part Number | Manufacturer | Package |
|---|---|---|
| MP4420GJ | Monolithic Power Systems | TSOT23-8 |
| MP4420GJ-P | Monolithic Power Systems | SOT-23-8 Thin, TSOT-23-8 |
| MP4420GJ-Z | Monolithic Power Systems | TSOT23-8 |
Other Switching Regulators (Buck)
- TPS54302 – Texas Instruments, Synchronous Step-Down Converter
- MAX20730 – Analog Devices, Synchronous Switching Regulator
- TLV62568 – Texas Instruments, Synchronous Buck Converter
- LM2596 – Texas Instruments, Step-Down Voltage Regulator
- TPS562200 – Texas Instruments, Synchronous Buck Converter
- AP63203WU – Diodes Incorporated, Synchronous Buck Converter
- TPS54202 – Texas Instruments, Synchronous Buck Converter
- AP63357DV-7 – Diodes Incorporated, Synchronous Buck Converter
All Switching Regulators (Buck) datasheetsAll Monolithic Power Systems datasheets (40)
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