My Inquiry
My Account
Analog Devices Inc. LTC3245MPMSE#TRPBF
- Part No.:
- LTC3245MPMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3245MPMSE#TRPBF.pdf
- Description:
- IC REG CHG PUMP ADJ 250MA 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,189
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3245MPMSE#TRPBF from Analog Devices is a wide-input, low-noise, 250mA switched-capacitor buck-boost DC/DC converter in a thermally enhanced 12-lead MSOP package. It delivers regulated 3.3V, 5V, or adjustable (2.5V–5V) output from 2.7V to 38V input, uses no inductors, features automatic multimode switching (2:1/1:1/1:2), and is AEC-Q100 qualified for automotive ECU and CAN transceiver supplies.
For engineers reviewing the LTC3245MPMSE#TRPBF datasheet, LTC3245MPMSE#TRPBF pinout, LTC3245MPMSE#TRPBF application, or LTC3245MPMSE#TRPBF equivalent, key selection criteria include its –55°C to 150°C operating junction temperature, pin-selectable Burst Mode® vs low-noise constant-frequency operation, PGOOD monitoring, and three external ceramic capacitor requirement (CFLY, CIN, COUT).
Technical Context
The LTC3245MPMSE#TRPBF implements fractional switched-capacitor conversion with internal mode selection logic that dynamically chooses between 2:1 step-down (VIN > 2×VOUT), 1:1 step-down (VOUT < VIN ≤ 2×VOUT), and 1:2 step-up (VIN < VOUT) based on real-time input voltage and load current. Its constant-frequency architecture minimizes output ripple and EMI compared to conventional charge pumps.
Regulation is achieved by sensing VOUT at the OUTS/ADJ pin and adjusting per-cycle charge transfer strength; PGOOD asserts when VOUT reaches 95% of regulation and deasserts at 91%. The device integrates overtemperature shutdown (175°C trip), short-circuit current limiting (~900mA), and soft-start (~500μs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.7V to 38V - supports direct battery input from 3-cell Li-ion to 24V industrial rails without pre-regulation. |
| IOUT Max | 250mA - sufficient for powering CAN transceivers, microcontroller housekeeping rails, or sensor interfaces. |
| VOUT Options | Fixed 3.3V/5V or adjustable 2.5V–5V - selected via SEL1/SEL2 pins; ADJ reference = 1.200V ±24mV. |
| Quiescent Current | 18µA typical - enables always-on operation in low-power automotive modules with minimal battery drain. |
| Operating Temp | –55°C to 150°C junction - MP-grade qualification ensures reliability in under-hood automotive environments. |
| Protection | Short-circuit and overtemperature - internal current limiting and thermal shutdown prevent damage during fault conditions. |
| Efficiency | 81% @ 12V→5V/250mA - high efficiency across wide input range reduces thermal load in space-constrained designs. |
Pinout & Package
Package: 12-lead plastic MSOP with exposed thermal pad (Pin 13 = GND), θJA = 40°C/W, rated for –55°C to 150°C junction operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (1,2,3) | Power Input | Three parallel inputs accept 2.7V–38V; must be tied together and decoupled locally with ≥1µF ceramic. |
| BURST (4) | Mode Control | Logic high = low-noise constant-frequency; logic low = Burst Mode® for higher light-load efficiency. |
| SEL1 (5), SEL2 (6) | Output Configuration | Set fixed 3.3V (HIGH/HIGH), fixed 5V (LOW/HIGH), adjustable (HIGH/LOW), or shutdown (LOW/LOW). |
| OUTS/ADJ (7) | VOUT Sense / Feedback | Serves as output voltage sense for fixed outputs or ADJ node (1.200V ref) for resistor-divider programming. |
| PGOOD (8) | Power Status Monitor | Open-drain output signals valid regulation (95% VOUT) and faults (drops below 91% VOUT). |
| C+ (9), C– (11) | Flying Capacitor Interface | Connect external 1µF ceramic flying capacitor (CFLY) between C+ and C– for all conversion modes. |
| VOUT (10) | Regulated Output | Delivers up to 250mA; requires ≥10µF low-ESR ceramic output capacitor (COUT) for stability and ripple control. |
| GND (12,13) | Ground Reference | Pins 12 and 13 (exposed pad) are common GND; exposed pad must be soldered to PCB ground plane for thermal and electrical performance. |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor architecture | Eliminates magnetic components, reducing BOM cost, board area, and EMI concerns in dense automotive layouts. |
| Automatic multimode switching | Seamlessly transitions between 2:1, 1:1, and 1:2 charge pump ratios to maintain regulation and peak efficiency across full VIN range. |
| Low-noise constant-frequency operation | 450–500kHz fixed oscillator enables predictable filtering and meets stringent automotive EMC requirements. |
| AEC-Q100 MP-grade qualification | Validated for –55°C to 150°C operation with extended reliability testing-suitable for engine control unit (ECU) power rails. |
| Integrated protection suite | Includes overtemperature shutdown (175°C), short-circuit current limit (~900mA), and UVLO (2.2V falling threshold). |
Applications
| Automotive ECU Power Supply | Industrial Housekeeping Rail |
|---|---|
Use Scenario: Powers microcontroller core logic, CAN FD transceiver, and EEPROM in engine control units exposed to under-hood temperatures up to 150°C. IC Role / Device Role / Timing Role: Primary buck-boost regulator converting 6V–16V battery rail to stable 5V for digital subsystems. Use Value: MP-grade thermal rating and AEC-Q100 compliance ensure uninterrupted operation during cold cranking and hot soak conditions. |
Use Scenario: Supplies 3.3V to isolated I/O controllers, analog front-ends, and watchdog circuits in factory automation PLCs. IC Role / Device Role / Timing Role: Secondary housekeeping regulator deriving clean 3.3V from 12V or 24V industrial bus. Use Value: 18µA quiescent current extends backup runtime; PGOOD enables system-level power sequencing and fault reporting. |
| Low-Power 12V-to-5V Conversion | Adjustable Sensor Bias Supply |
Use Scenario: Replaces inefficient linear regulators in battery-powered test equipment requiring 5V at ≤250mA from 12V source. IC Role / Device Role / Timing Role: High-efficiency (81% @ 12V→5V/250mA) switched-capacitor converter eliminating heat sink requirements. Use Value: No inductor simplifies layout and reduces component count; Burst Mode® extends battery life during standby. |
Use Scenario: Generates precision 2.7V bias for MEMS pressure sensors in medical instrumentation with tight accuracy requirements. IC Role / Device Role / Timing Role: Adjustable-output regulator using external resistor divider (RA/RB) referenced to 1.200V ADJ pin. Use Value: 1.200V ±24mV reference tolerance enables ±1.5% output accuracy over temperature; low noise preserves signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost charge pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3265EMSE#TRPBF | Lower IOUT (100mA), integrated LDO post-regulator, dual output (±VOUT), wider VOUT adj range (1.2V–5.5V). | Suitable for bipolar analog supply generation (e.g., op-amp rails), not single-rail high-current conversion. | Select when dual-polarity or ultra-low-noise LDO-staged output is required; not a drop-in replacement for 250mA loads. |
| MAX17521ATP+T | Inductor-based synchronous buck-boost, higher IOUT (2A), wider VOUT range (0.8V–24V), but larger solution size and higher EMI. | Better suited for high-current industrial motor drives or telecom power where 250mA is insufficient. | Choose when >250mA output or programmable VOUT down to 0.8V is mandatory; requires inductor and more complex layout. |
Compared with LTC3245MPMSE#TRPBF, LTC3265EMSE#TRPBF trades output current for bipolar capability and lower noise, while MAX17521ATP+T sacrifices integration and EMI performance for higher power density and flexibility-neither offers identical MP-grade temperature range or inductorless simplicity.
Availability
LTC3245MPMSE#TRPBF is available at Aetrix Electronics and suitable for automotive ECU power supplies, industrial housekeeping rails, and low-power 12V-to-5V conversion requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LTC3245MPMSE#TRPBF 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets with precision power, sensing, and signal chain solutions.
The LTC3245MPMSE#TRPBF belongs to Analog Devices' high-reliability power management portfolio designed specifically for harsh-environment automotive and industrial applications demanding wide VIN, extended temperature operation, and robust protection.
FAQ
What is the maximum operating junction temperature for the LTC3245MPMSE#TRPBF?
The LTC3245MPMSE#TRPBF is tested and guaranteed over a full –55°C to 150°C operating junction temperature range. This MP-grade qualification exceeds standard automotive AEC-Q100 Grade 1 (–40°C to 125°C) and supports under-hood applications where ambient temperatures exceed 125°C. Thermal derating applies above 150°C to preserve reliability.
How does the LTC3245MPMSE#TRPBF select between 2:1, 1:1, and 1:2 charge pump modes?
The LTC3245MPMSE#TRPBF uses internal comparators with load-dependent hysteresis to automatically select the optimal conversion ratio: 2:1 step-down when VIN > 2×VOUT, 1:1 step-down when VOUT < VIN ≤ 2×VOUT, and 1:2 step-up when VIN < VOUT. Mode transitions occur seamlessly without external intervention to maintain regulation and maximize efficiency.
Can the LTC3245MPMSE#TRPBF generate an adjustable output voltage, and how is it configured?
Yes, the LTC3245MPMSE#TRPBF supports adjustable output from 2.5V to 5V by connecting the OUTS/ADJ pin to a resistor divider between VOUT and GND, with SEL1 = HIGH and SEL2 = LOW. The ADJ pin regulates to 1.200V ±24mV, so RA/RB ratio determines VOUT using VOUT = 1.2V × (1 + RA/RB). RB should be 1kΩ–1MΩ to balance accuracy and quiescent current.
What external components are required for basic operation of the LTC3245MPMSE#TRPBF?
The LTC3245MPMSE#TRPBF requires only three external ceramic capacitors: one 1µF flying capacitor (CFLY) between C+ and C–, one ≥1µF input capacitor (CIN) near VIN pins, and one ≥10µF low-ESR output capacitor (COUT) at VOUT. No inductors, diodes, or compensation networks are needed-enabling minimal footprint and simplified design.
Does the LTC3245MPMSE#TRPBF include power-good monitoring, and how is it used?
Yes, the LTC3245MPMSE#TRPBF features an open-drain PGOOD pin that goes high-impedance when VOUT reaches 95% of regulation and pulls low when VOUT drops below 91%. It must be pulled up externally (e.g., to VOUT) with a resistor. PGOOD enables system-level power sequencing, reset assertion, and fault detection in automotive and industrial controllers.
LTC3245MPMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Adjustable (Programmable)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 38V
- Voltage - Output (Min/Fixed):
- 2.5V (3.3V, 5V)
- Voltage - Output (Max):
- 5V
- Current - Output:
- 250mA
- Frequency - Switching:
- 450kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-MSOP-EP
LTC3245MPMSE#TRPBF FAQ
1.How can I place an order for LTC3245MPMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3245MPMSE#TRPBF 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 LTC3245MPMSE#TRPBF reliable?
The price and inventory of LTC3245MPMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3245MPMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3245MPMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3245MPMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3245MPMSE#TRPBF?
LTC3245MPMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3245MPMSE#TRPBF 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 LTC3245MPMSE#TRPBF?
For technical support, including LTC3245MPMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3245MPMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3245MPMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3245MPMSE#TRPBF 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 LTC3245MPMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3245MPMSE#TRPBF?
All LTC3245MPMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3245MPMSE#TRPBF, 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 LTC3245MPMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3245MPMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3245MPMSE#TRPBF 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…
