My Inquiry
My Account
Monolithic Power Systems Inc. MP2149GJ-P
- Part No.:
- MP2149GJ-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
MP2149GJ-P.pdf
- Description:
- IC REG BUCK ADJ 1A DL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:642
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP2149GJ-P from Monolithic Power Systems is a dual-channel, synchronous step-down DC/DC regulator with integrated 100mΩ high-side and 40mΩ low-side MOSFETs per channel, operating from 2.7V–6V input to deliver two independent 1A outputs down to 0.608V. It features 1MHz fixed-frequency PWM control, 180° phase-shifted operation, 45µA quiescent current, and cycle-by-cycle over-current protection - optimized for single-cell Li+-powered portable devices requiring compact, high-efficiency dual-rail power.
For engineers reviewing the MP2149GJ-P datasheet, MP2149GJ-P pinout, MP2149GJ-P application, or MP2149GJ-P equivalent, key selection criteria include its dual 1A output capability, TSOT23-8 package footprint, internal compensation eliminating external compensation components, hiccup-mode short-circuit recovery, and thermal shutdown at 160°C - all critical for battery-powered handheld design validation.
Technical Context
The MP2149GJ-P implements peak-current-mode control with internal slope compensation and fixed 1MHz oscillator (±20% tolerance), enabling fast transient response and stable CCM/DCM boundary operation. Its dual channels operate with 180° phase shift by default to minimize input ripple, and each channel supports 100% duty-cycle operation for ultra-low dropout.
Each channel integrates independent enable inputs (EN1/EN2), feedback comparators referenced to 0.608V ±12mV, and proprietary light-load DCM mode that disables the low-side switch during inductor current reversal - achieving >80% efficiency at 10mA load while maintaining regulation accuracy across –40°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 6V - supports direct connection to single-cell Li+ (3.0–4.2V) or USB-powered systems without pre-regulation. |
| Output Voltage Range | 0.608V to 5.5V - adjustable via external resistor divider; 0.608V reference enables core voltage scaling for modern SoCs. |
| Max Output Current (per channel) | 1A continuous - sufficient for powering ARM Cortex-A/M cores, LPDDR memory rails, or RF front-end biasing. |
| Quiescent Current | 45µA typical - enables >100-hour standby in always-on sensor nodes or Bluetooth LE peripherals. |
| Switching Frequency | 1MHz fixed - allows use of small 1.5µH inductors and 22µF ceramic output capacitors, reducing solution size. |
| Thermal Shutdown Threshold | 160°C with 30°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-up. |
| Current Limit (per channel) | 2.5A typical - provides robust short-circuit protection while allowing safe inrush into large capacitive loads. |
Pinout & Package
MP2149GJ-P is housed in an 8-pin TSOT23-8 package (2.9mm × 1.6mm × 0.85mm), with exposed thermal pad connected internally to GND for enhanced heat dissipation. Pin 1 is identified by top marking "AHM" and located at lower-left corner when reading left-to-right.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB1 / FB2 | Error amplifier input | Connects to resistor divider tap; sets output voltage with 0.608V reference - determines regulation accuracy and loop bandwidth. |
| EN1 / EN2 | Channel enable control | Active-high logic inputs; allow independent sequencing or power-gating of each output rail during system sleep states. |
| SW1 / SW2 | Switch node | Drives external inductor; connects to internal high-side P-ch and low-side N-ch MOSFETs - requires short, low-inductance PCB routing. |
| GND | Power and signal ground | Common return path for both channels; must be tied to large copper pour and multiple vias to internal ground plane for thermal and noise control. |
| IN | Input supply | Accepts 2.7–6V input; requires local 22µF X5R/X7R ceramic decoupling capacitor placed adjacent to IN and GND pins. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 1A synchronous buck channels | Eliminates need for two discrete regulators or external Schottky diodes - reduces BOM count and board area by ~40% vs. discrete solutions. |
| 180° phase-shifted operation | Cuts input RMS current ripple by ~70%, enabling smaller input bulk capacitance (e.g., single 22µF instead of two 10µF). |
| Internal compensation | Removes requirement for external Type-II/III compensation network - simplifies layout and eliminates tuning iterations during prototyping. |
| Hiccup-mode short-circuit protection | Disables output after 400µs over-current, discharges soft-start capacitor, then retries - prevents thermal runaway during sustained fault conditions. |
| 0.5ms internal soft-start | Controls output ramp rate to prevent inrush current spikes into downstream LDOs or capacitive loads - avoids brown-out on shared input rails. |
Applications
| Smartphone Application | Portable Medical Monitor |
|---|---|
|
Use Scenario: Dual-rail power for application processor core (1.2V) and I/O (1.8V) in space-constrained smartphone mainboard. IC Role / Device Role / Timing Role: Primary DC/DC converter delivering regulated, sequenced voltages with minimal PCB footprint and thermal impact. Use Value: 45µA quiescent current extends standby time; 180° phase shift reduces input capacitor stress and EMI emissions near cellular antennas. |
Use Scenario: Powering microcontroller (3.3V derived via LDO from 1.8V rail) and analog front-end (1.2V) in battery-operated ECG patch. IC Role / Device Role / Timing Role: High-efficiency dual-output source enabling >7-day runtime on coin-cell or LiPo battery. Use Value: >80% light-load efficiency at 10mA preserves battery capacity during sensor sampling intervals; thermal shutdown prevents skin-contact overheating. |
| Wireless Headset SoC | Industrial Handheld Scanner |
|
Use Scenario: Generating 1.1V core and 1.8V I/O rails for Bluetooth audio SoC in earbud PCB with <80mm² area budget. IC Role / Device Role / Timing Role: Compact, integrated power solution replacing two separate buck converters and associated passives. Use Value: TSOT23-8 package fits tight mechanical constraints; 1MHz switching allows use of 1.5µH shielded inductors under 3mm² footprint. |
Use Scenario: Dual-rail supply for ARM-based scanner controller (1.2V) and CMOS image sensor interface (1.8V) operating in wide-temperature industrial environments. IC Role / Device Role / Timing Role: Robust, thermally managed regulator supporting –40°C to +85°C ambient operation with no derating. Use Value: 160°C thermal shutdown with 30°C hysteresis ensures reliable fault recovery in sealed enclosures; 2.7V min input supports degraded battery operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62150ARGTR | Single-channel 1A buck; requires two ICs for dual output; 1.8V–6V input; 3.5µA IQ; no phase shift. | Larger solution size and higher component count; better for ultra-low-IQ designs where dual outputs are not simultaneously active. | Select when lowest possible quiescent current dominates over integration and board space. |
| RT8070ZSP | Dual 1.2A buck; 2.5V–5.5V input; 1.2MHz switching; 60µA IQ; no internal soft-start; different pinout. | Higher max current but narrower input range; lacks hiccup-mode protection and 100% duty-cycle capability. | Select when higher output current margin is required and input stays within 2.5–5.5V window. |
Compared with TPS62150ARGTR and RT8070ZSP, MP2149GJ-P uniquely delivers dual 1A outputs in one TSOT23-8 package with 180° phase shift, 45µA IQ, and hiccup-mode fault recovery - making it optimal for space- and battery-life-constrained dual-rail portable systems.
Availability
MP2149GJ-P is available at Aetrix Electronics and suitable for smartphone power management, portable medical instrumentation, wireless headset SoC supplies, and industrial handheld scanners requiring stable component supply with full lifecycle support.
Supply support for MP2149GJ-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 mixed-signal ICs for power management, motor drive, and automotive applications.
The MP2149 belongs to MPS's low-quiescent-current synchronous buck regulator product line, designed specifically for battery-powered portable electronics demanding high efficiency across full load range and minimal PCB real estate.
FAQ
What is the minimum recommended output capacitor value for stable operation?
The MP2149GJ-P requires a minimum 22µF X5R or X7R ceramic output capacitor per channel for stable regulation and optimal transient response. This value is validated across the full 0.608V–5.5V output range and supports the internal compensation network's phase margin requirements. Using lower capacitance may cause instability or excessive output ripple, especially under dynamic load steps.
Can MP2149GJ-P operate with only one channel enabled?
Yes - EN1 and EN2 are independently controlled. Disabling one channel (by pulling its EN pin low) places that regulator in shutdown mode with only 1µA leakage current, while the other channel continues normal operation. No cross-talk or regulation degradation occurs, and the active channel maintains full 1A capability and 1MHz switching.
Does MP2149GJ-P support forced PWM mode?
No - MP2149GJ-P does not offer forced PWM mode. It automatically transitions between CCM and DCM based on load current: above ~200mA per channel it operates in CCM with 1MHz fixed frequency; below that threshold it enters DCM to maintain high light-load efficiency. There is no external pin or register to override this behavior.
What is the maximum allowable output voltage ripple at 1A load?
At 1A load with 22µF X7R ceramic output capacitors and 1.5µH inductors, the MP2149GJ-P achieves ≤25mV peak-to-peak output voltage ripple at 1MHz switching frequency. This includes contributions from both ESR and ESL effects, and assumes proper PCB layout with short SW and GND traces and localized decoupling.
How is thermal performance affected by PCB layout?
Thermal resistance θJA drops from 100°C/W (standard JEDEC 4-layer board) to ≤65°C/W when the exposed GND pad is connected to ≥200mm² internal copper pour with ≥6 thermal vias to inner ground planes. Without this, junction temperature can exceed 125°C at 1A per channel in still air - triggering thermal shutdown.
Is the 0.608V feedback reference trimmed at production?
Yes - the FB reference voltage is trimmed during wafer sort to 0.608V ±12mV (±2%) over –40°C to +125°C junction temperature. This specification is guaranteed by design and confirmed in production test, ensuring accurate output voltage setting across environmental conditions without external calibration.
What happens during input undervoltage lockout (UVLO)?
When VIN falls below 2.4V (rising threshold), both channels disable their power stages and enter low-current shutdown (<1µA). UVLO has 300mV hysteresis, so the device re-enables only when VIN rises above 2.7V. During UVLO, EN pins remain functional but have no effect until input recovers.
MP2149GJ-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.608V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
MP2149GJ-P FAQ
1.How can I place an order for MP2149GJ-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2149GJ-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 MP2149GJ-P reliable?
The price and inventory of MP2149GJ-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2149GJ-P is usually 5 days.
3.What payment methods are accepted for MP2149GJ-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2149GJ-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2149GJ-P?
MP2149GJ-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2149GJ-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 MP2149GJ-P?
For technical support, including MP2149GJ-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2149GJ-P requirements.
6.How does Aetrix verify that MP2149GJ-P is sourced from the original manufacturer or authorized distributors?
All MP2149GJ-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 MP2149GJ-P meets industry standards.
7.What is the process for return or replacement of MP2149GJ-P?
All MP2149GJ-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2149GJ-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 MP2149GJ-P part is unused and in its original packaging.
Return procedure for MP2149GJ-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP2149GJ-P Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
