My Inquiry
My Account
Analog Devices Inc. LTC3245IDE#TRPBF
- Part No.:
- LTC3245IDE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LTC3245IDE#TRPBF.pdf
- Description:
- IC REG CHRG PUMP ADJ 250MA 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,677
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3245IDE#TRPBF from Analog Devices is a wide-input, low-noise, 250mA switched-capacitor buck-boost DC/DC converter supporting 2.7V–38V input and delivering regulated 3.3V, 5V, or adjustable (2.5V–5V) output. It uses fractional charge-pump conversion with automatic 2:1/1:1/1:2 mode switching, requires no inductors, and features pin-selectable Burst Mode® for efficiency optimization. It is AEC-Q100 qualified and used in automotive ECU/CAN transceiver supplies.
For engineers reviewing the LTC3245IDE#TRPBF datasheet, LTC3245IDE#TRPBF pinout, LTC3245IDE#TRPBF application, or LTC3245IDE#TRPBF equivalent, key selection criteria include input voltage range (2.7V–38V), output current capability (250mA), quiescent current (18µA), thermal grade (–40°C to 125°C), and package type (12-pin 3mm × 4mm DFN).
Technical Context
The LTC3245IDE#TRPBF implements a constant-frequency switched-capacitor architecture with three automatic conversion modes: 2:1 step-down (VIN > 2×VOUT), 1:1 step-down (VOUT < VIN ≤ 2×VOUT), and 1:2 step-up (VIN < VOUT). Internal comparators with load-dependent hysteresis select the optimal mode to maintain regulation and peak efficiency across varying line and load conditions.
It integrates soft-start, overtemperature shutdown (175°C trip), short-circuit current limiting (~900mA), and open-drain PGOOD with 95% rising / 91% falling thresholds. The OUTS/ADJ pin serves dual roles-output sensing for fixed outputs or feedback reference (1.200V ±24mV) for adjustable configurations-and supports resistor-divider programming from 2.5V to 5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.7V to 38V - enables direct operation from 12V automotive battery, 24V industrial rails, or wide-range unregulated supplies without pre-regulation. |
| IOUT Max | 250mA - sufficient to power CAN transceivers, microcontroller housekeeping rails, or small logic subsystems. |
| IQ (Operating) | 18µA - ensures ultra-low standby power in always-on automotive modules and battery-backed systems. |
| fOSC | 450kHz to 500kHz - fixed-frequency operation minimizes conducted EMI and simplifies input/output filtering vs. variable-frequency charge pumps. |
| VOUT Options | Fixed 3.3V, fixed 5V, or adjustable 2.5V–5V - selected via SEL1/SEL2 pins; eliminates need for external feedback resistors in standard applications. |
| Protection | Overtemperature shutdown (175°C), short-circuit current limit (900mA), UVLO (2.4V rising) - provides robust fault handling in harsh environments. |
| Package | 12-pin 3mm × 4mm DFN with exposed pad - thermally enhanced footprint supports 125°C junction operation with θJA = 43°C/W. |
Pinout & Package
Package: 12-pin (3mm × 4mm) plastic DFN with exposed thermal pad (Pin 13 = GND). Requires soldering of exposed pad to PCB ground plane for thermal performance and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 2, 3) | Power Input | Three parallel inputs accept 2.7V–38V; must be connected together at board level for low-impedance path and current sharing. |
| BURST (Pin 4) | Mode Control Input | Logic high enables low-noise constant-frequency operation; logic low enables Burst Mode® for higher light-load efficiency (4µA shutdown). |
| SEL1 / SEL2 (Pins 5, 6) | Output Configuration Inputs | Set operating mode per Table 1: both low = shutdown; SEL2=high/SEL1=low = 5V fixed; both high = 3.3V fixed; SEL2=low/SEL1=high = adjustable. |
| OUTS/ADJ (Pin 7) | Feedback Reference | Serves as output sense node for fixed outputs or 1.200V reference for adjustable configuration using external resistor divider. |
| PGOOD (Pin 8) | Open-Drain Status Output | Signals valid regulation when VOUT reaches ≥95% of target; pulled up externally (e.g., to VOUT) to generate active-high logic signal. |
| C+ / C– (Pins 9, 11) | Flying Capacitor Terminals | Connect external 1µF ceramic flying capacitor; polarity-sensitive - C+ ties to VIN side during charge phase, C– to GND. |
| VOUT (Pin 10) | Regulated Output | Delivers final regulated voltage; capable of sourcing up to 250mA; includes internal reverse-blocking to prevent backfeed when VIN drops below UVLO. |
| GND (Pins 12, 13) | Ground Reference | Pins 12 and 13 (exposed pad) are internally connected and must both be tied to system ground for thermal and electrical performance. |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor design | Eliminates magnetic components, reducing BOM cost, board area, and EMI concerns - ideal for space-constrained automotive and industrial PCBs. |
| Automatic multimode operation | Seamlessly transitions between 2:1, 1:1, and 1:2 charge-pump ratios based on VIN and load - maintains regulation and >80% efficiency across full input range without user intervention. |
| AEC-Q100 qualification | Qualified for automotive applications (Grade I, –40°C to 125°C), including stress testing for temperature cycling, HTOL, and ESD - suitable for ECU, body control, and infotainment subsystems. |
| Low-noise constant frequency | 450–500kHz fixed switching frequency with <20mVpp ripple (COUT = 10µF) - meets stringent noise requirements for analog sensors and communication ICs. |
| Thermally enhanced DFN | 3mm × 4mm package with exposed GND pad achieves θJA = 43°C/W - enables 250mA continuous output at 125°C ambient without derating. |
Applications
| Automotive ECU Power Supply | Industrial Housekeeping Rail |
|---|---|
Use Scenario: Powers microcontroller, CAN transceiver, and sensor interface circuitry in engine control units under cold-crank (≥2.7V) and load-dump (≤38V) conditions. IC Role / Device Role / Timing Role: Primary non-isolated DC/DC regulator converting battery rail to stable 5V or 3.3V for digital logic and communication peripherals. Use Value: AEC-Q100 qualification, wide VIN range, and 18µA IQ enable reliable, low-power operation across automotive temperature and voltage extremes. | Use Scenario: Generates local 3.3V or 5V supply for PLC I/O modules, HMI controllers, and fieldbus interfaces in factory automation equipment. IC Role / Device Role / Timing Role: Compact, inductorless housekeeping regulator replacing linear regulators or larger buck converters in space-limited enclosures. Use Value: No inductors reduce EMI susceptibility and simplify layout; 250mA output supports multiple low-power peripherals from single IC. |
| Low-Power 12V-to-5V Conversion | Adjustable Bias Supply for Analog Circuitry |
Use Scenario: Converts 12V intermediate rail to clean 5V for USB peripherals, display drivers, or FPGA configuration circuits in portable test equipment. IC Role / Device Role / Timing Role: Efficient buck-boost converter maintaining regulation even as 12V input sags to 5V or rises to 15V during transient events. Use Value: 81% efficiency at 12V→5V/250mA and low-noise operation prevent interference with sensitive analog or timing circuits. | Use Scenario: Provides programmable 2.5V–5V bias voltage for op-amp references, ADC/DAC supplies, or RF front-end biasing in instrumentation systems. IC Role / Device Role / Timing Role: Adjustable-output charge-pump regulator with precise 1.200V reference enabling accurate resistor-divider programming. Use Value: 24mV reference tolerance and low output impedance (0.3Ω @ 5V) ensure stable, low-drift bias voltage under dynamic load conditions. |
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 |
|---|---|---|---|
| MAX17521ATP+T | Inductor-based synchronous buck-boost; 4.5V–60V input; 3.3V/5V fixed or adjustable; 500mA output; higher peak efficiency but larger solution size. | Requires external inductor and compensation network; better suited for high-current (>300mA) or high-efficiency-critical designs where board area is less constrained. | Select MAX17521ATP+T when output current exceeds 250mA or when lower output ripple (<10mV) is required despite added component count. |
| LTC3265EDE#TRPBF | Low-noise inverting/positive charge pump; 4.5V–32V input; generates ±5V or +5V/–5V; 100mA per rail; includes LDO post-regulators for ultra-low noise. | Designed for bipolar or dual-rail applications (e.g., op-amp supplies); not a direct replacement for single-rail buck-boost needs. | Choose LTC3265EDE#TRPBF only for dual-output or ultra-low-noise analog biasing; not suitable for single-rail 5V/3.3V housekeeping use cases. |
Compared with MAX17521ATP+T and LTC3265EDE#TRPBF, the LTC3245IDE#TRPBF uniquely delivers 250mA single-rail output in an inductorless 3mm × 4mm DFN with AEC-Q100 qualification - making it optimal for space- and reliability-constrained automotive and industrial 12V/24V-to-3.3V/5V conversion.
Availability
LTC3245IDE#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, AEC-Q100 compliance, and compact inductorless design.
Supply support for LTC3245IDE#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 industrial, automotive, communications, and healthcare markets.
The LTC3245IDE#TRPBF belongs to Analog Devices' Power Management product line, designed specifically for high-reliability, wide-input-voltage DC/DC conversion in automotive and industrial environments where inductor-free solutions are preferred.
FAQ
What is the operating temperature range for the LTC3245IDE#TRPBF?
The LTC3245IDE#TRPBF is rated for operation from –40°C to +125°C junction temperature. This Grade I specification makes it suitable for under-hood automotive applications and industrial environments with elevated ambient temperatures. Its thermal performance relies on proper soldering of the exposed pad (Pin 13) to the PCB ground plane to achieve the specified θJA of 43°C/W.
Does the LTC3245IDE#TRPBF require an inductor?
No, the LTC3245IDE#TRPBF is a switched-capacitor (charge-pump) DC/DC converter and requires only three external ceramic capacitors: one 1µF flying capacitor (CFLY) and two 10µF output/input capacitors. This inductorless architecture reduces EMI, saves board space, and lowers BOM cost compared to inductor-based buck-boost solutions.
How is the output voltage configured on the LTC3245IDE#TRPBF?
The LTC3245IDE#TRPBF supports fixed 3.3V, fixed 5V, or adjustable 2.5V–5V output via SEL1 and SEL2 pins. For fixed outputs, OUTS/ADJ is shorted to VOUT; for adjustable output, a resistor divider connects OUTS/ADJ to GND with VOUT feeding the top of the divider. The internal reference is 1.200V ±24mV, enabling precise programming using standard resistor values.
What protection features does the LTC3245IDE#TRPBF include?
The LTC3245IDE#TRPBF integrates short-circuit current limiting (~900mA), overtemperature shutdown (trip at ~175°C, restart at ~165°C), input undervoltage lockout (2.4V rising), and reverse-current blocking when VIN falls below regulation. These protections ensure robust operation in automotive transients and industrial fault conditions without external circuitry.
Can the LTC3245IDE#TRPBF operate from a 24V industrial supply?
Yes, the LTC3245IDE#TRPBF supports input voltages up to 38V, making it fully compatible with 24V nominal industrial systems, including those experiencing surge events up to 36V. At 24V input, it efficiently delivers 5V/250mA (≈78% typical efficiency) or 3.3V/250mA (≈75% typical efficiency) in 1:1 or 2:1 mode depending on load and output setting.
LTC3245IDE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-WFDFN 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:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DFN (4x3)
LTC3245IDE#TRPBF FAQ
1.How can I place an order for LTC3245IDE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3245IDE#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 LTC3245IDE#TRPBF reliable?
The price and inventory of LTC3245IDE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3245IDE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3245IDE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3245IDE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3245IDE#TRPBF?
LTC3245IDE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3245IDE#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 LTC3245IDE#TRPBF?
For technical support, including LTC3245IDE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3245IDE#TRPBF requirements.
6.How does Aetrix verify that LTC3245IDE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3245IDE#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 LTC3245IDE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3245IDE#TRPBF?
All LTC3245IDE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3245IDE#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 LTC3245IDE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3245IDE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3245IDE#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…
