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Monolithic Power Systems Inc. MP1470GJ-P
- Part No.:
- MP1470GJ-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MP1470GJ-P.pdf
- Description:
- IC REG BUCK ADJ 2A TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,343
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Product details
Overview
MP1470GJ-P from Monolithic Power Systems is a synchronous step-down DC/DC converter with integrated 163mΩ high-side and 86mΩ low-side MOSFETs, delivering up to 2A continuous output current from a 4.7V–16V input. It operates at a fixed 500kHz switching frequency, supports adjustable output down to 0.8V via resistor divider feedback, and integrates AAM light-load power-save mode, internal soft-start (1ms), and hiccup-mode over-current protection. It targets compact, high-efficiency point-of-load regulation in space-constrained consumer electronics.
For engineers reviewing the MP1470GJ-P datasheet, MP1470GJ-P pinout, MP1470GJ-P application, or MP1470GJ-P equivalent, this page delivers verified technical context, validated pin functions, confirmed package mapping to TSOT-23-6, real-world application constraints (e.g., BST capacitor requirement, EN voltage clamping at 6.5V), and documented alternative selection guidance for legacy design continuity.
Technical Context
The MP1470GJ-P employs peak-current-mode control with a fixed 500kHz oscillator and 90ns minimum on-time, enabling stable operation across wide VIN–VOUT ratios. Its internal 5V regulator powers all circuitry and remains functional across the full 4.7V–16V input range, while the error amplifier compares FB against a precise 800mV reference to generate COMP voltage for cycle-by-cycle current limiting.
AAM (Advanced Asynchronous Modulation) dynamically disables the internal clock when VCOMP falls below 0.5V and VFB < VREF, enabling PFM operation at light loads. The bootstrap driver uses an external 1µF capacitor between BST and SW pins, with internal UVLO (2.2V rising threshold) ensuring reliable high-side gate drive during startup and transient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.7V to 16V - Supports 5V, 12V, and 15V rails without external regulators or level-shifting. |
| Output Current | 2A continuous - Sustained delivery under thermal limits with proper PCB copper area and airflow. |
| Switching Frequency | Fixed 500kHz (±10%) - Enables compact magnetics (e.g., 4.9µH inductor) and predictable EMI filtering. |
| Feedback Reference | 800mV ±24mV - Sets output voltage accuracy; enables 3.3V output using 40.2kΩ/13kΩ resistor divider. |
| HS/LS RDS(ON) | 163mΩ / 86mΩ - Minimizes conduction loss at 2A load; contributes to >90% efficiency at mid-load (VIN=12V, VOUT=3.3V). |
| Soft-Start Time | 1ms - Prevents output overshoot and inrush current during power-up; internally generated ramp. |
| Thermal Shutdown | 150°C activation, 130°C recovery - Hysteresis prevents oscillation; protects die during sustained overload or poor heatsinking. |
Pinout & Package
MP1470GJ-P is housed in a 6-pin TSOT-23 package (JEDEC MO-193 AB), with exposed pad for thermal enhancement. Pin 1 is bottom-left when viewing top marking left-to-right; GND (Pin 1) must be connected with multiple vias to inner ground plane for optimal thermal and noise performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power and signal reference ground | Primary return path for switch current and feedback network; requires low-impedance PCB connection to minimize noise coupling into FB. |
| SW (Pin 2) | Switch node | Drives external inductor; high di/dt node requiring short, wide trace routing away from analog signals (e.g., FB, EN). |
| IN (Pin 3) | Main power input | Supplies internal regulator and high-side MOSFET; requires local 22µF ceramic decoupling capacitor placed adjacent to pin. |
| FB (Pin 4) | Output voltage feedback | Senses divided output voltage; internal 800mV reference sets regulation point; sensitive to noise-keep traces short and shielded. |
| EN (Pin 5) | Enable control | Digital input with 1.5V typical threshold and 6.5V Zener clamp; pull to VIN via ≥55kΩ resistor for automatic startup. |
| BST (Pin 6) | Bootstrap supply | Connects to SW via 1µF ceramic capacitor; supplies floating gate drive for high-side MOSFET; critical for duty cycles >65%. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode; reduces conduction loss by ~40% vs. asynchronous designs at 2A load. |
| Internal AAM light-load mode | Enables PFM operation below ~100mA load, maintaining >85% efficiency where traditional PWM would drop to <70%. |
| Integrated 163mΩ/86mΩ MOSFETs | Reduces BOM count and layout area; eliminates gate-drive timing mismatch risks inherent in discrete FET solutions. |
| Hiccup-mode over-current protection | Enters periodic restart (not latch-off) during output short-circuit, limiting average power dissipation to safe thermal levels. |
| Internal soft-start (1ms) | Prevents output voltage overshoot and input inrush; no external capacitor required-simplifies design validation. |
Applications
| Game Consoles | Digital Set-Top Boxes |
|---|---|
Use Scenario: Regulating 3.3V/2A core logic rail from 12V main supply in handheld gaming devices with strict size and thermal constraints. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing dynamic load transients during GPU/CPU burst activity. Use Value: 500kHz fixed frequency enables small 4.9µH inductor; AAM mode extends battery life during menu/idle states without sacrificing transient response. |
Use Scenario: Generating stable 5V/2A supply for HDMI interface ICs and video decoder SoCs in compact set-top box enclosures. IC Role / Device Role / Timing Role: Point-of-load regulator with tight line/load regulation (<±1%) across 4.7–16V input variation from wall adapter. Use Value: Integrated MOSFETs eliminate external FET layout sensitivity; hiccup-mode OCP prevents thermal runaway during HDMI hot-plug events. |
| Flat-Panel Television | General Purpose Embedded Systems |
Use Scenario: Providing 1.8V/2A power to LCD timing controller (TCON) boards where board space is limited and EMI must meet CISPR-22 Class B. IC Role / Device Role / Timing Role: High-frequency buck converter operating in continuous conduction mode (CCM) with controlled EMI spectrum. Use Value: Fixed 500kHz frequency allows deterministic EMI filter design; TSOT-23-6 footprint fits narrow TCON board margins. |
Use Scenario: Delivering adjustable 0.8–5V/2A output for FPGA I/O banks or microcontroller peripherals in industrial control modules. IC Role / Device Role / Timing Role: Programmable output buck regulator with EN-controlled sequencing and thermal fault reporting via shutdown behavior. Use Value: Adjustable output via resistor divider supports multiple voltage domains; EN pin enables system-level power sequencing with 100kΩ pull-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP1476GJ-Z | Successor with improved efficiency (up to 95%), lower quiescent current (0.35mA vs. 0.83mA), and extended temperature range (−40°C to +150°C). | Designed for new designs requiring higher reliability in automotive infotainment or industrial edge nodes. | Select MP1476GJ-Z for new projects; MP1470GJ-P remains viable for cost-sensitive, non-automotive legacy refreshes. |
| RT7272BGJ6F | 6-pin TSOT-23 buck with 3A rating, 600kHz switching, and 0.6V reference; lacks AAM mode but includes programmable soft-start. | Better suited for higher-current applications where light-load efficiency is secondary to peak output capability. | Choose RT7272BGJ6F only if 3A output or 0.6V reference is mandatory; MP1470GJ-P offers superior light-load performance and proven thermal behavior in 2A use cases. |
Compared with MP1476GJ-Z, MP1470GJ-P trades higher light-load efficiency and simpler AAM implementation for lower max current and narrower temp range; versus RT7272BGJ6F, it prioritizes low-IQ operation and integrated protection over raw current headroom-making it optimal for compact, battery-aware consumer systems.
Availability
MP1470GJ-P is available at Aetrix Electronics and suitable for game consoles, digital set-top boxes, flat-panel television subsystems, and general-purpose embedded systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP1470GJ-P includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with over two decades of expertise in DC/DC conversion, motor drivers, and LED lighting controllers.
The MP1470 belongs to MPS's high-density synchronous buck converter product line, designed specifically for space-constrained consumer electronics requiring high efficiency, minimal external components, and robust protection in 4.7–16V input environments.
FAQ
What is the maximum recommended output current for MP1470GJ-P under continuous operation?
The MP1470GJ-P is rated for 2A continuous output current under specified thermal conditions: ambient temperature ≤+85°C, 4-layer PCB with 1-in² 2oz copper pour under the exposed pad, and no forced airflow. At 12V input and 3.3V output, derating begins above 1.8A when ambient exceeds +65°C due to thermal shutdown threshold at 150°C junction temperature.
Can MP1470GJ-P operate with an input voltage below 4.7V?
No-MP1470GJ-P has a hard under-voltage lockout (UVLO) with a rising threshold of 4.2V and hysteresis of 340mV, meaning it will not start or sustain regulation below approximately 3.85V. Attempting operation below 4.7V violates the Recommended Operating Conditions and may result in erratic switching, unregulated output, or failure to enable.
Is an external bootstrap diode required for MP1470GJ-P?
An external bootstrap diode (e.g., IN4148) is optional and only beneficial when VOUT ≥3.3V and duty cycle exceeds 65% (i.e., VIN/VOUT > 1.52). For 12V→3.3V (D ≈ 27.5%), it is unnecessary; for 5V→3.3V (D = 66%), it improves high-side gate drive margin and efficiency by ~0.5–1.0%.
How does the AAM (Advanced Asynchronous Modulation) mode affect light-load efficiency?
AAM mode reduces switching frequency dynamically when load current drops below ~100mA, transitioning from PWM to PFM operation. This lowers quiescent current from 0.83mA to ~1.6μA in shutdown and maintains >85% efficiency at 10mA load-versus ~65% for standard PWM-by eliminating unnecessary gate drive and switching losses.
What is the purpose of the 140mV threshold on the FB pin during fault conditions?
The 140mV threshold triggers hiccup-mode protection: when FB voltage falls below this level (indicating severe output undervoltage, e.g., short circuit), the controller stops switching, waits ~20ms, then attempts restart. This limits average power dissipation to <1W during sustained faults, preventing thermal damage while enabling automatic recovery once the fault clears.
Does MP1470GJ-P support adjustable switching frequency?
No-MP1470GJ-P uses a fixed internal oscillator set to 500kHz (typical), with tolerance of ±10% (400–580kHz) across temperature and input voltage. Frequency cannot be adjusted externally; for programmable frequency, consider MPS's MP2451 or MPQ4420A families.
What is the minimum recommended BST capacitor value and type?
The datasheet specifies a 1µF ceramic capacitor (X5R or X7R, 10V rating) between BST and SW pins. Lower values risk insufficient gate drive voltage during high-duty-cycle operation, causing high-side FET dropout and increased conduction loss. Tantalum or electrolytic capacitors are not recommended due to ESR-induced voltage droop.
MP1470GJ-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.7V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 14.4V
- Current - Output:
- 2A
- Frequency - Switching:
- 490kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
MP1470GJ-P FAQ
1.How can I place an order for MP1470GJ-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP1470GJ-P on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MP1470GJ-P reliable?
The price and inventory of MP1470GJ-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP1470GJ-P is usually 5 days.
3.What payment methods are accepted for MP1470GJ-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1470GJ-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP1470GJ-P?
MP1470GJ-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP1470GJ-P order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MP1470GJ-P?
For technical support, including MP1470GJ-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1470GJ-P requirements.
6.How does Aetrix verify that MP1470GJ-P is sourced from the original manufacturer or authorized distributors?
All MP1470GJ-P products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MP1470GJ-P meets industry standards.
7.What is the process for return or replacement of MP1470GJ-P?
All MP1470GJ-P units undergo pre-shipment inspection (PSI). If there is an issue with MP1470GJ-P, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MP1470GJ-P part is unused and in its original packaging.
Return procedure for MP1470GJ-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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