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Monolithic Power Systems Inc. MP1527DR-LF-Z
- Part No.:
- MP1527DR-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
MP1527DR-LF-Z.pdf
- Description:
- IC REG BOOST ADJ 2A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,283
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Product details
Overview
MP1527DR-LF-Z from Monolithic Power Systems is a 2A, 1.3MHz fixed-frequency current-mode step-up DC-DC converter in a 4mm × 4mm 16-pin QFN package. It regulates output voltages from 3.3V to 25V with up to 93% efficiency, features internal 150mΩ MOSFET switch, cycle-by-cycle current limiting, and soft-start control-designed for compact, noise-sensitive power rails in portable electronics.
For engineers reviewing the MP1527DR-LF-Z datasheet, MP1527DR-LF-Z pinout, MP1527DR-LF-Z application, or MP1527DR-LF-Z equivalent, this page delivers verified technical context, validated pin functions, real-world application constraints, and confirmed alternative parts with documented functional differences-not generic timing or interface claims.
Technical Context
The MP1527DR-LF-Z implements fixed-frequency (1.0–1.5MHz typ. 1.3MHz) current-mode PWM control with an internal transconductance error amplifier (300µA/V), 1.22V feedback reference, and 2µA soft-start current source. Its architecture includes a dedicated BP pin supplying 2.4V LDO bias for internal circuitry and a FAULT pin supporting multi-unit fault propagation via shared 100kΩ pull-up.
It integrates thermal shutdown (160°C), input undervoltage lockout (2.1–2.4V rising threshold, 100mV hysteresis), and timer-latch fault detection triggered when FB falls below 1.098V and SS charges to 1.2V over ~6×10⁵·CSS seconds-enabling robust protection during overload, short-circuit, or thermal events without external supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.3MHz typical; enables use of sub-5µH inductors and <22µF ceramic output capacitors for space-constrained PCB layouts. |
| Peak Switch Current Limit | 2.0A minimum; ensures safe operation under transient load surges up to 500mA output at 12V with 5V input. |
| Feedback Reference Voltage | 1.22V ±2%; sets output voltage accuracy via external resistor divider-e.g., 91kΩ/10kΩ yields 12V ±1.5%. |
| Input Voltage Range | 2.6V to 25V; supports single-cell Li-ion (3.0–4.2V), dual-cell NiMH (2.4–3.0V), and industrial 12–24V rails. |
| Efficiency | Up to 93% at 500mA load, VIN=5V, VOUT=12V; minimizes thermal rise in sealed handheld enclosures. |
| Quiescent Current | 1.0µA shutdown current (VEN<0.3V); extends battery life in always-on standby modes. |
| Thermal Resistance θJA | 46°C/W (QFN16); requires ≥1"² 1oz copper pad for full 2A continuous operation at +85°C ambient. |
Pinout & Package
MP1527DR-LF-Z uses a thermally enhanced 4mm × 4mm, 16-pin QFN package (JEDEC MO-220 variant) with exposed thermal pad (Pin 12) soldered to PGND for optimal heat dissipation. Pin 1 is marked by dot; pins are arranged in two rows (4×4 grid) with SGND and PGND distributed across multiple pins for low-impedance return paths.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 6, 7 | No Connect | Internally unconnected; must remain floating or tied to SGND per layout guidelines-no routing or loading permitted. |
| 3 | BP (Bias Power) | 2.4V LDO output; bypassed with ≥10nF capacitor to SGND-zero external load allowed to avoid regulation failure. |
| 4 | EN (Enable) | Logic-level control: >1.5V = active; <0.3V = 1µA shutdown; 100mV hysteresis prevents chatter near threshold. |
| 5, 13 | SGND (Signal Ground) | Analog reference for FB, COMP, SS, FAULT; routed separately from PGND to minimize noise coupling into feedback path. |
| 8 | IN (Input Supply) | Main power input (2.6–25V); requires ≥4.7µF low-ESR ceramic capacitor placed within 3mm of pin to suppress switching ripple. |
| 9, 10 | SW (Switch Node) | Drain of internal 150mΩ n-MOSFET; connects directly to inductor and Schottky rectifier-high dv/dt node requiring tight loop area. |
| 11, 12 | PGND (Power Ground) | High-current return for SW and internal MOSFET; tied to thermal pad and external ground plane-must not share trace with SGND. |
| 14 | FAULT (I/O) | Open-drain fault indicator: pulled low on UVLO/overcurrent/thermal event; supports wired-OR of up to 20 units with single 100kΩ pull-up. |
| 15 | SS (Soft-Start) | 2µA current-sourced node; controls startup inrush and fault timeout via 10–22nF capacitor-sets tSS = 2.75×10⁵·CSS. |
| 16 | FB (Feedback) | Resistive divider input referenced to 1.22V; input bias current ±100nA enables high-impedance dividers without gain error. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 150mΩ Power Switch | Eliminates external MOSFET and gate driver, reducing BOM count and layout complexity for 2A boost applications. |
| Timer-Latch Fault Protection | Auto-shutdown on sustained FB <1.098V; requires EN toggle or VIN cycle to reset-prevents thermal runaway during output short. |
| Zero-Current Shutdown Mode | 0.5–1.0µA quiescent current in disable state; critical for battery-powered devices requiring multi-week shelf life. |
| External Compensation Network | COMP pin allows full control of loop stability via R3/C3; supports optimization across 3.3–25V output and 10–500mA load ranges. |
| 1.3MHz Fixed Switching Frequency | Enables EMI filtering above AM radio band (1.6MHz); reduces conducted noise in wireless LAN PC cards and cellular handsets. |
Applications
| Handheld Computers & PDAs | Cell Phones & Digital Cameras |
|---|---|
|
Use Scenario: Powering 3.3V or 5V logic rails from single Li-ion cell (3.0–4.2V). IC Role / Device Role / Timing Role: Primary step-up regulator delivering regulated 5V to USB peripherals and camera sensor interfaces. Use Value: 93% peak efficiency at 300mA extends usable runtime by >12% versus 85% efficient alternatives under same load. |
Use Scenario: Driving white LED backlight (3–4 LEDs in series) from 3.7V battery. IC Role / Device Role / Timing Role: Constant-voltage boost converter with FB divider configured for 12V output. Use Value: 1.3MHz operation avoids audible coil whine and simplifies EMI filter design for FCC/CE compliance. |
| SOHO Routers & PCMCIA Cards | Small LCD Displays |
|
Use Scenario: Generating 12V bias for Ethernet PHY magnetics and 5V for USB host controller. IC Role / Device Role / Timing Role: Dual-rail power solution using single MP1527DR-LF-Z with resistive feedback reconfiguration. Use Value: Tiny 4×4mm QFN footprint saves >35mm² vs. discrete boost solutions-critical for mini-PCI form factor. |
Use Scenario: Supplying 15V gate drive for TFT LCD source drivers from 5V system rail. IC Role / Device Role / Timing Role: High-efficiency step-up stage enabling 15V at 100mA with <15°C temperature rise. Use Value: Thermal resistance of 46°C/W allows full 2A capability without heatsink-reducing bill-of-materials cost. |
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, 2.5MHz switching frequency, no integrated LDO (BP pin absent), requires external compensation. | Better suited for >1A loads and ultra-compact designs needing >2MHz operation; lacks BP-regulated bias for analog circuits. | Select when output current exceeds 1.5A or board space demands <3mm × 3mm IC footprint-accept trade-off of higher EMI and no internal LDO. |
| LT3467EDD | Lower 1.3A peak current, 1.2MHz frequency, integrated Schottky diode, no FAULT I/O or timer-latch protection. | Targeted at simpler, lower-cost boost applications where fault propagation and latch-off are unnecessary. | Choose for cost-sensitive consumer devices with <300mA load and no requirement for coordinated multi-rail fault shutdown. |
Compared with TPS61088RHLR and LT3467EDD, MP1527DR-LF-Z uniquely balances 2A capability, integrated 2.4V LDO (BP), and fault coordination-making it optimal for multi-rail embedded systems requiring robust, space-efficient, and thermally manageable boost conversion.
Availability
MP1527DR-LF-Z is available at Aetrix Electronics and suitable for handheld computing, wireless communication modules, and small-format LCD displays requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for MP1527DR-LF-Z 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 computing, communications, and consumer electronics.
The MP1527 product line targets medium-to-high current DC-DC boost applications demanding compact size, high efficiency, and integrated protection-specifically engineered for portable and space-constrained embedded systems.
FAQ
What is the maximum recommended output voltage for MP1527DR-LF-Z?
The MP1527DR-LF-Z is rated for output voltages up to 25V, as confirmed by absolute maximum ratings (SW pin withstands −0.3V to 27V) and functional testing in the datasheet's Figure 9 (12V @ 500mA) and Figure 10 (multi-LED string drive). Operation beyond 25V risks exceeding internal MOSFET breakdown limits and invalidates thermal derating assumptions.
Can MP1527DR-LF-Z operate with input voltage below 2.6V?
No-input voltage must remain ≥2.6V per Recommended Operating Conditions. Below 2.6V, the device enters undervoltage lockout (UVLO) at 2.1–2.4V (rising threshold), disabling switching. Attempting operation at 2.5V causes intermittent regulation and potential instability due to insufficient headroom for the internal 2.4V LDO (BP pin).
How is the soft-start time calculated for MP1527DR-LF-Z?
Soft-start duration is determined by tSS = 2.75 × 10⁵ × CSS, where CSS is the capacitor (10–22nF) from SS to SGND. For example, a 10nF capacitor yields ~2.75s startup ramp; a 22nF capacitor yields ~6.05s. This linear ramp clamps COMP voltage to limit inrush current during power-up.
What is the purpose of the BP pin, and can it power external circuitry?
The BP pin outputs a regulated 2.4V from an internal LDO powered by IN. It supplies bias to internal analog blocks and must be bypassed with ≥10nF to SGND. External loading is strictly prohibited-datasheet explicitly states "Do not apply an external load to BP"-as even 10µA draw degrades regulation accuracy and may cause startup failure.
Does MP1527DR-LF-Z support synchronous rectification?
No-it uses an external Schottky diode (e.g., MBR0530 in Figure 9) for output rectification. The IC integrates only the high-side n-channel MOSFET switch (SW pin); no synchronous driver or low-side FET control is provided. Synchronous operation would require external gate drivers and complementary MOSFETs not supported by the control architecture.
What thermal pad connection is required for the QFN package?
The exposed thermal pad (Pin 12) must be soldered to a solid PGND copper area ≥1"² with ≥4 thermal vias (0.3mm diameter) connecting to inner ground planes. This achieves the specified θJA = 46°C/W; omitting vias or isolating the pad raises junction temperature by >30°C at 2A load, risking thermal shutdown.
Is the FAULT pin actively driven high during normal operation?
No-the FAULT pin is open-drain and remains high-impedance when no fault is detected. It requires an external pull-up resistor (typically 100kΩ to IN) to maintain high state. During fault, it sinks current to pull low; leakage is <250nA, enabling parallel connection of up to 20 units on one pull-up.
MP1527DR-LF-Z 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-Z FAQ
1.How can I place an order for MP1527DR-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP1527DR-LF-Z 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-Z reliable?
The price and inventory of MP1527DR-LF-Z 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-Z is usually 5 days.
3.What payment methods are accepted for MP1527DR-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1527DR-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP1527DR-LF-Z?
MP1527DR-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP1527DR-LF-Z 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-Z?
For technical support, including MP1527DR-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1527DR-LF-Z requirements.
6.How does Aetrix verify that MP1527DR-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP1527DR-LF-Z 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-Z meets industry standards.
7.What is the process for return or replacement of MP1527DR-LF-Z?
All MP1527DR-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP1527DR-LF-Z, 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-Z part is unused and in its original packaging.
Return procedure for MP1527DR-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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