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Monolithic Power Systems Inc. MP1527DM-LF
- Part No.:
- MP1527DM-LF
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MP1527DM-LF.pdf
- Description:
- IC REG BOOST ADJ 2A 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,686
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Product details
Overview
MP1527DM-LF from Monolithic Power Systems is a 2A, 1.3MHz fixed-frequency current-mode step-up DC-DC converter in a 14-lead TSSOP package. It regulates output voltages from 3.3V to 25V with up to 93% efficiency, features internal 150mΩ power switch, cycle-by-cycle current limiting, and timer-latch fault protection. It is used in handheld computers, PCMCIA cards, and small LCD displays where compact size and noise-sensitive operation are critical.
For engineers reviewing the MP1527DM-LF datasheet, MP1527DM-LF pinout, MP1527DM-LF application, or MP1527DM-LF equivalent, key selection considerations include input voltage range (2.6V–25V), soft-start timing control via external capacitor, fault detection behavior, thermal shutdown threshold (160°C), and compensation network design for loop stability across load and input variations.
Technical Context
The MP1527DM-LF implements fixed-frequency (1.0–1.5MHz typ. 1.3MHz) current-mode PWM control with an internal transconductance error amplifier (300µA/V) and 1.22V feedback reference. Its architecture includes a dedicated 2.4V LDO (BP pin) for internal biasing and a 2µA soft-start/fault timer current source tied to the SS pin.
It integrates a 150mΩ n-channel MOSFET switch, 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 topologies. Fault response is latched: FB falling below 1.098V initiates SS ramping; reaching 1.2V asserts FAULT low and disables SW.
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 compact layouts. |
| Peak Switch Current Limit | 2.0A minimum - sets maximum inductor peak current, constraining design margin for 500mA–2A output loads. |
| Input Voltage Range | 2.6V to 25V - supports single-cell Li-ion (2.6V min after discharge) through 24V industrial rails. |
| Feedback Reference Voltage | 1.22V ±2% - defines output setpoint accuracy; used with external resistor divider to scale VOUT from 3.3V to 25V. |
| Efficiency | Up to 93% at 5V→12V/500mA - reduces thermal load in space-constrained portable devices. |
| Thermal Shutdown Threshold | 160°C - protects die during sustained overload or poor PCB heat sinking; auto-recovery requires EN or VIN cycling. |
| Soft-Start Timing Control | 2µA current source into SS pin - allows precise soft-start duration (e.g., 10nF → ~275ms) to limit inrush current. |
Pinout & Package
MP1527DM-LF is housed in a 14-lead thin shrink small-outline package (TSSOP14) with 0.65mm lead pitch and exposed thermal pad (PGND-connected). Package dimensions: 5.0mm × 4.4mm × 1.2mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 11 | NC | No-connect pins - must remain unconnected per datasheet; no internal connection or function. |
| 3 | BP | Bias supply output (2.4V LDO) - bypassed with ≥10nF capacitor to SGND; zero external load permitted. |
| 4 | EN | Enable input - logic high (>1.5V) activates regulator; logic low (<0.3V) enters 1µA shutdown mode. |
| 5, 6 | SGND | Signal ground - separate return path for feedback, compensation, and enable circuitry; routed separately from PGND. |
| 7 | IN | Main input supply - accepts 2.6V–25V; requires ≥4.7µF low-ESR input capacitor placed adjacent to IC. |
| 8 | SW | Switch node - drain of internal 150mΩ n-MOSFET; connects to inductor and Schottky rectifier anode. |
| 9 | PGND | Power ground - high-current return for SW and internal switch; tied to thermal pad; must be low-impedance plane. |
| 10 | FAULT | Fault I/O - open-drain output pulled low on UVLO, overcurrent, or thermal fault; supports wired-OR with up to 20 units. |
| 12 | SS | Soft-start/fault timer - 2µA current source charges external capacitor; controls startup slew rate and fault timeout. |
| 13 | FB | Feedback input - senses divided output voltage; regulation occurs when FB = 1.22V; bias current <±100nA. |
| 14 | COMP | Compensation node - transconductance amplifier output; external RC network sets loop poles/zeros for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 150mΩ Power Switch | Eliminates need for external MOSFET and gate driver, reducing BOM count and layout area in boost converters. |
| Timer-Latch Fault Protection | Prevents repeated switching under short-circuit or undervoltage by latching off until EN or VIN is cycled. |
| Zero-Current Shutdown Mode | Reduces quiescent current to 0.5–1.0µA when disabled, extending battery life in always-on portable systems. |
| Internal 2.4V LDO (BP Pin) | Provides stable bias rail independent of input variation, improving regulation accuracy and noise immunity. |
| 1.3MHz Fixed Switching Frequency | Enables use of miniature 4.7µH inductors and avoids AM radio band interference in handheld applications. |
Applications
| Handheld Computers & PDAs | PCMCIA / Mini-PCI Cards |
|---|---|
|
Use Scenario: Powering 3.3V or 5V logic rails from single-cell Li-ion (2.7–4.2V) battery. IC Role / Device Role / Timing Role: Primary step-up regulator supplying core voltage to CPU, memory, and peripheral interfaces. Use Value: 93% peak efficiency minimizes battery drain; 1.3MHz operation avoids audible noise and enables ultra-compact filter components. |
Use Scenario: Generating 12V bias for RF front-end or flash memory programming in laptop expansion cards. IC Role / Device Role / Timing Role: High-efficiency boost converter delivering regulated 12V from 3.3V host bus supply. Use Value: Internal 2A switch handles transient loads without external FET; fault latch prevents system crash during card insertion/removal. |
| Cell Phones & Digital Cameras | Small LCD Displays |
|
Use Scenario: Driving white LED backlight arrays requiring 15–25V from 3.3V or 4.2V battery rail. IC Role / Device Role / Timing Role: Constant-voltage boost source feeding parallel LED strings with current-setting resistors. Use Value: 25V max output supports 6+ white LEDs in series; soft-start prevents camera flash-induced display flicker. |
Use Scenario: Supplying 12V or 15V for TFT panel gate drivers and source drivers in portable monitors. IC Role / Device Role / Timing Role: Main DC-DC converter generating high-side rail for display controller ICs and level shifters. Use Value: Thermal shutdown (160°C) protects display module during ambient temperature excursions; TSSOP package aids reflow assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP1527DR-LF-Z | Same silicon, but in 4mm×4mm QFN16 package with ΘJA = 46°C/W (vs. TSSOP's 90°C/W); no NC pins. | Better thermal performance in high-power density designs; requires different PCB footprint and stencil. | Select DR variant when board space is constrained and thermal management is critical; avoid if legacy TSSOP layout exists. |
| TPS61088RHLR | TI part: 2.5A switch, 2.5V–12V input, 4.5V–18V output, 1.2MHz, integrated compensation, no BP pin. | Lacks dedicated bias LDO and external compensation flexibility; higher input voltage limit not needed in low-VIN apps. | Choose TPS61088 only if simplified design (no COMP tuning) and tighter input range (2.5V–12V) match system requirements. |
Compared with MP1527DM-LF, the DR variant offers superior thermal dissipation in compact layouts, while the TPS61088 trades external loop control for integration-making MP1527DM-LF preferable where adjustable compensation and wide 2.6V–25V input support are essential.
Availability
MP1527DM-LF is available at Aetrix Electronics and suitable for handheld computing, PCMCIA card power, and small LCD display applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP1527DM-LF 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 product line delivers highly integrated, high-frequency boost converters targeting space- and noise-sensitive portable electronics, emphasizing thermal robustness, fault resilience, and flexible loop compensation.
FAQ
What is the minimum input voltage required for MP1527DM-LF to start switching?
The MP1527DM-LF has an input undervoltage lockout (UVLO) threshold of 2.1V (rising) with 100mV hysteresis. It begins switching only when VIN exceeds 2.1V and EN is asserted high. Below 2.1V, the device remains in shutdown regardless of EN state, protecting downstream circuitry from unstable regulation.
Can MP1527DM-LF drive multiple white LED strings directly?
No-it is a constant-voltage boost converter, not a constant-current LED driver. To drive white LEDs, connect its regulated output to a current-setting resistor network or external LED driver IC. Figure 10 in the datasheet shows a configuration using MP1527DM-LF to supply 12V to up to six LEDs per string with discrete current limiting.
How is the soft-start duration calculated for MP1527DM-LF?
Soft-start time tSS (seconds) = 2.75 × 10⁵ × CSS, where CSS is the capacitor (farads) from SS to SGND. For a 10nF capacitor, tSS ≈ 275ms. The same capacitor sets fault timeout: tFAULT = 6 × 10⁵ × CSS ≈ 600ms for 10nF.
What is the role of the BP pin, and can it power external circuitry?
The BP pin outputs a regulated 2.4V LDO supply for internal biasing. It must be bypassed with ≥10nF capacitor to SGND but cannot drive external loads-any external current draw degrades regulation accuracy and may cause malfunction. The datasheet explicitly prohibits loading BP.
Why does MP1527DM-LF require external compensation at the COMP pin?
External RC compensation allows designers to tailor loop stability across varying output capacitance, ESR, load current, and input voltage. This is essential for boost converters due to the right-half-plane zero (RHPZ), which shifts with load and inductance-fixed internal compensation would risk instability in real-world conditions.
Is MP1527DM-LF pin-compatible with other Monolithic Power Systems boost converters?
No-MP1527DM-LF has a unique 14-pin TSSOP pinout optimized for its feature set (e.g., dedicated BP, FAULT, SS pins). It is not pin-compatible with MP1541, MP2307, or MP9486. Layout reuse requires verification against the specific pin map in datasheet page 3.
What failure modes trigger the FAULT pin assertion?
FAULT goes low during three confirmed conditions: (1) FB voltage drops below 1.098V (output undervoltage), (2) thermal shutdown activation (die ≥160°C), or (3) cycle-by-cycle current limit violation causing sustained overcurrent. All cause SS capacitor ramping; reaching 1.2V latches FAULT low until EN or VIN is cycled.
MP1527DM-LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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:
- 14-TSSOP
MP1527DM-LF FAQ
1.How can I place an order for MP1527DM-LF through Aetrix?
Please submit a Request for Quotation (RFQ) for MP1527DM-LF 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 MP1527DM-LF reliable?
The price and inventory of MP1527DM-LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP1527DM-LF is usually 5 days.
3.What payment methods are accepted for MP1527DM-LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1527DM-LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP1527DM-LF?
MP1527DM-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP1527DM-LF 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 MP1527DM-LF?
For technical support, including MP1527DM-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1527DM-LF requirements.
6.How does Aetrix verify that MP1527DM-LF is sourced from the original manufacturer or authorized distributors?
All MP1527DM-LF 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 MP1527DM-LF meets industry standards.
7.What is the process for return or replacement of MP1527DM-LF?
All MP1527DM-LF units undergo pre-shipment inspection (PSI). If there is an issue with MP1527DM-LF, 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 MP1527DM-LF part is unused and in its original packaging.
Return procedure for MP1527DM-LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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