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Monolithic Power Systems Inc. MP1527DR-LF-P
- Part No.:
- MP1527DR-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
MP1527DR-LF-P.pdf
- Description:
- IC REG BOOST ADJ 2A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,148
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Product details
Overview
MP1527DR-LF-P from Monolithic Power Systems is a 2A, 1.3MHz fixed-frequency current-mode step-up DC-DC converter in a 4mm × 4mm QFN-16 package. It regulates output voltages from 3.3V to 25V with up to 93% efficiency, features internal 150mΩ MOSFET, cycle-by-cycle current limiting, and soft-start with programmable fault timer-designed for compact, noise-sensitive power rails in handheld computing and LCD bias supplies.
For engineers reviewing the MP1527DR-LF-P datasheet, MP1527DR-LF-P pinout, MP1527DR-LF-P application, or MP1527DR-LF-P equivalent, key selection criteria include input voltage range (2.6V–25V), FB regulation threshold (1.22V), thermal shutdown (160°C), EN logic thresholds (1.5V high / 0.3V low), and COMP-based loop compensation requirements.
Technical Context
The MP1527DR-LF-P implements fixed-frequency (1.0–1.5MHz typ. 1.3MHz) current-mode control using an internal transconductance error amplifier (300µA/V) and PWM comparator referenced to a 1.22V FB threshold. Its architecture includes a dedicated 2.4V LDO (BP pin) powering internal circuitry and a 2µA soft-start/fault timer current source tied to the SS pin.
It integrates a 150mΩ n-channel MOSFET switch (VIN = 5V), supports duty cycles up to 90%, and uses external RC compensation at COMP to stabilize the control loop against right-half-plane zero effects inherent to boost topology-enabling stable operation across wide VIN (2.6–25V), VOUT (3.3–25V), and load (up to 2A) ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.3MHz typical; enables use of small 4.7µH inductors and ceramic output capacitors for compact PCB layout. |
| Peak Switch Current Limit | 2.0A minimum; protects internal MOSFET during overload or short-circuit conditions without external sensing. |
| FB Regulation Threshold | 1.22V ±2%; sets output voltage via external resistor divider (e.g., 10kΩ + 8.2kΩ for 3.3V). |
| Input Voltage Range | 2.6V to 25V; supports single-cell Li-ion (3.0–4.2V), USB (5V), and industrial 12–24V rails. |
| Efficiency | Up to 93% at 500mA load (VIN=5V, VOUT=12V); minimizes thermal stress in space-constrained applications. |
| Thermal Shutdown | 160°C; latches off SW until thermal recovery and EN or VIN cycling, preventing permanent damage. |
| Soft-Start Time | Programmable via SS capacitor (10–22nF); limits inrush current by clamping COMP voltage during startup. |
Pinout & Package
MP1527DR-LF-P is housed in a thermally enhanced 4mm × 4mm QFN-16 package with exposed thermal pad (PGND-connected), 0.5mm pitch, and pin 1 marked by dot. Package thermal resistance ΘJA is 46°C/W on 1"² 1oz copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Power Input | Accepts 2.6–25V supply; requires ≥4.7µF low-ESR ceramic input capacitor placed adjacent to pin. |
| SW | Switch Node | Drain of internal 150mΩ n-MOSFET; connects to inductor and Schottky rectifier (e.g., MBR0530). |
| FB | Feedback Input | Senses output voltage via resistive divider; 1.22V reference determines regulation setpoint. |
| COMP | Error Amplifier Output | Transconductance node (300µA/V) requiring external RC network to stabilize boost control loop. |
| EN | Enable Control | Logic-level input (1.5V high / 0.3V low); places IC in <1µA shutdown when pulled low. |
| SS | Soft-Start/Fault Timer | Sources 2µA to external capacitor; controls startup ramp rate and fault timeout (tFAULT = 6×10⁵ × CSS). |
| FAULT | Fault Indicator/Output | Open-drain output pulled low on UVLO, overcurrent, or thermal fault; supports wired-OR of up to 20 units. |
| BP | LDO Output | 2.4V internal regulator output; bypassed with ≥10nF capacitor to SGND-no external loading permitted. |
| PGND / SGND | Power / Signal Ground | Separate ground pins minimize noise coupling; PGND handles high di/dt switch return, SGND references analog circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 150mΩ Power Switch | Eliminates external MOSFET and gate driver, reducing BOM count and board area in portable designs. |
| Timer-Latch Fault Protection | Detects output undervoltage (FB < 1.098V), disables SW, and asserts FAULT-requires EN or VIN reset to recover. |
| Zero-Current Shutdown Mode | Reduces quiescent current to 0.5–1.0µA when EN is low, extending battery life in always-on standby circuits. |
| Internal 2.4V LDO (BP Pin) | Provides clean, regulated bias for internal circuitry independent of input ripple-bypassed with 10nF capacitor. |
| 1.3MHz Fixed Switching Frequency | Enables use of sub-5mm inductors and avoids AM radio band interference, critical for mobile handset compliance. |
Applications
| Handheld Computing Power | Small LCD Bias Supply |
|---|---|
Use Scenario: Powering 3.3V or 5V logic rails and I/O in PDAs and ruggedized tablets with single Li-ion input. IC Role / Device Role / Timing Role: Primary step-up regulator delivering up to 2A with fast transient response to CPU burst loads. Use Value: 93% peak efficiency and 1.3MHz operation minimize heat and filter component size in thin-profile enclosures. | Use Scenario: Generating 12–25V backlight bias for monochrome or color STN/TFT LCD panels in SOHO routers and PCMCIA cards. IC Role / Device Role / Timing Role: Constant-voltage boost converter with programmable soft-start to prevent panel flash during power-up. Use Value: Internal 2A current limit and latch-off fault protection ensure reliable start-up under varying panel capacitance loads. |
| Wireless LAN PC Card | Digital Camera Flash LED Driver |
Use Scenario: Providing regulated 3.3V/5V from USB or battery to WLAN baseband and RF ICs in Mini-PCI form factor. IC Role / Device Role / Timing Role: Noise-controlled power stage with fixed 1.3MHz frequency to avoid interference with 2.4GHz/5GHz RF bands. Use Value: Low EMI design and cycle-by-cycle current limiting maintain signal integrity during transmit bursts. | Use Scenario: Driving white LED strings (up to 6 LEDs per string) in compact digital cameras requiring 12V–18V forward voltage. IC Role / Device Role / Timing Role: Constant-voltage boost controller with external current-sense resistor enabling precise LED current regulation. Use Value: COMP-based loop compensation allows stable dimming control across wide temperature and battery voltage ranges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher 5A switch current, 2.5V–12V input, integrated 13mΩ FET, but requires external compensation and lacks FAULT pin. | Preferred for >2A loads; unsuitable where fault coordination across multiple rails is required. | Select when higher output current and lower RDS(on) outweigh need for integrated fault signaling. |
| RT8535GJ6F | 2A switch, 2.5V–24V input, 1.2MHz switching, no BP pin or timer-latch fault-uses hiccup mode instead. | Better for cost-sensitive designs without multi-rail fault propagation; less robust under sustained short-circuit. | Choose when simplified layout and lower unit cost are prioritized over coordinated fault shutdown. |
Compared with TPS61088RHLR and RT8535GJ6F, MP1527DR-LF-P uniquely combines 2A capability with integrated FAULT signaling, BP-regulated bias, and timer-latch protection-making it optimal for space-constrained, multi-rail systems requiring deterministic fault isolation and low-noise operation.
Availability
MP1527DR-LF-P is available at Aetrix Electronics and suitable for handheld computing, LCD bias, wireless LAN PC cards, and digital camera power management requiring stable component supply, lead-free compliance, and QFN-16 thermal performance.
Supply support for MP1527DR-LF-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 headquartered in Los Gatos, CA, specializing in high-performance power management ICs for consumer, industrial, and automotive markets.
The MP1527 belongs to MPS's high-frequency boost converter product line, engineered specifically for compact, noise-sensitive portable electronics requiring efficient medium-current voltage step-up with robust protection and minimal external components.
FAQ
What is the maximum recommended output voltage for MP1527DR-LF-P?
The MP1527DR-LF-P is rated for output voltages up to 25V, as confirmed by Absolute Maximum Ratings (SW pin: –0.3V to 27V) and Recommended Operating Conditions. Operation beyond 25V risks exceeding internal voltage tolerances and may trigger undervoltage lockout or thermal shutdown.
Can MP1527DR-LF-P operate with input voltage below 2.6V?
No. The device has a guaranteed minimum operating input voltage of 2.6V, with undervoltage lockout (UVLO) activating at 2.1–2.4V (rising). Below 2.6V, regulation fails and the IC remains disabled-even if EN is asserted-due to insufficient headroom for the internal 2.4V BP LDO.
How is the soft-start time calculated for MP1527DR-LF-P?
Soft-start time tSS is determined by tSS = 2.75 × 10⁵ × CSS, where CSS is the capacitor (in farads) from SS to SGND. For a 10nF capacitor, tSS ≈ 2.75ms; for 22nF, ≈ 6.05ms. This linear ramp limits COMP voltage to prevent input current overshoot during startup.
Does MP1527DR-LF-P require an external Schottky diode?
Yes. The MP1527DR-LF-P uses an asynchronous boost topology with an internal n-MOSFET switch but no integrated rectifier. A Schottky diode (e.g., MBR0530) must be connected between SW and VOUT to provide the freewheeling path-selected for low forward voltage and fast recovery to maintain efficiency.
What is the purpose of the BP pin, and can it power external circuitry?
The BP pin delivers a regulated 2.4V output from an internal LDO powered by IN. It must be bypassed with ≥10nF to SGND but cannot drive external loads-its current capability is limited to internal bias only. Applying external load causes regulation failure and potential thermal overstress.
How does the FAULT pin behave during overcurrent events?
When FB voltage drops below 1.098V (e.g., due to output short), the FAULT pin transitions from high-impedance to active-low after the SS capacitor charges to 1.2V (timer-latch). It remains latched low until EN is cycled or VIN is removed-enabling coordinated shutdown across multiple MP1527 units wired in parallel.
Is MP1527DR-LF-P RoHS-compliant and halogen-free?
Yes. The "-LF" suffix explicitly denotes lead-free and RoHS-compliant packaging. Monolithic Power Systems confirms halogen-free status per IEC 61249-2-21 for the QFN-16 package, verified in MPS's material declarations and PPAP documentation.
MP1527DR-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.6V
- Voltage - Input (Max):
- 25V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- 25V
- Current - Output:
- 2A
- Frequency - Switching:
- 1.3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (4x4)
MP1527DR-LF-P FAQ
1.How can I place an order for MP1527DR-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP1527DR-LF-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 MP1527DR-LF-P reliable?
The price and inventory of MP1527DR-LF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP1527DR-LF-P is usually 5 days.
3.What payment methods are accepted for MP1527DR-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1527DR-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP1527DR-LF-P?
MP1527DR-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP1527DR-LF-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 MP1527DR-LF-P?
For technical support, including MP1527DR-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1527DR-LF-P requirements.
6.How does Aetrix verify that MP1527DR-LF-P is sourced from the original manufacturer or authorized distributors?
All MP1527DR-LF-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 MP1527DR-LF-P meets industry standards.
7.What is the process for return or replacement of MP1527DR-LF-P?
All MP1527DR-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP1527DR-LF-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 MP1527DR-LF-P part is unused and in its original packaging.
Return procedure for MP1527DR-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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