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Analog Devices Inc. LTC3250ES6-1.2#TRMPBF
- Part No.:
- LTC3250ES6-1.2#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC3250ES6-1.2#TRMPBF.pdf
- Description:
- IC REG CHARGE PUMP 1.2V TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,687
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Product details
Overview
LTC3250ES6-1.2#TRMPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, inductorless charge pump step-down DC/DC converter delivering a regulated 1.2V ±4% output from 2.7V–5.5V input, supporting up to 250mA load current with 81% efficiency at Li-Ion input, low-noise constant-frequency (1.5MHz) operation, and shutdown disconnect. It serves as a compact, low-ESR-capacitor-based power supply for battery-powered portable electronics requiring stable low-voltage rails.
For engineers reviewing the LTC3250ES6-1.2#TRMPBF datasheet, LTC3250ES6-1.2#TRMPBF pinout, LTC3250ES6-1.2#TRMPBF application, or LTC3250ES6-1.2#TRMPBF equivalent, key selection criteria include its 1.2V fixed output tolerance, 250mA output capability, 35µA no-load quiescent current, SOT-23-6 ThinSOT™ package footprint, and Burst Mode® operation for light-load efficiency optimization.
Technical Context
The LTC3250ES6-1.2#TRMPBF uses a 2-phase nonoverlapping switched-capacitor architecture to achieve 2:1 fractional voltage conversion without inductors, delivering half the input current to the output - enabling ~2× higher efficiency than LDOs. Its internal 1.5MHz oscillator drives C+ and C– flying capacitor switching, with regulation maintained via internal resistor-divider feedback and error-amplified charge-pump current control.
Burst Mode® operation activates below ~30mA load to reduce quiescent current to 35µA (typ), while soft-start limits inrush during turn-on. Built-in thermal shutdown (>160°C) and short-circuit current limiting (~500mA) ensure robustness; shutdown disconnects VOUT from VIN and reduces supply current to <1µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.2V ±4% - tightly regulated rail suitable for core logic or low-voltage I/O in space-constrained systems |
| Max Output Current | 250mA - supports moderate-power digital loads such as DSPs, microcontrollers, or sensor interfaces |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-Ion (3.0–4.2V), 3-cell NiMH (3.6V), or 5V USB-supplied systems |
| Quiescent Current | 35µA - enables multi-week battery life in always-on monitoring applications |
| Switching Frequency | 1.5MHz (typ) - allows use of small ceramic capacitors and simplifies EMI filtering |
| Shutdown Current | <1µA - preserves battery charge during system sleep or standby modes |
| Load Regulation | 0.12mV/mA - ensures ≤30mV output deviation across full 250mA load range |
| Operating Temp Range | –40°C to 85°C - qualified for industrial and portable consumer environments |
Pinout & Package
Package: 6-pin ThinSOT™ (SOT-23-6), 1mm profile, JEDEC MO-193 compliant, with exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 2.7–5.5V; requires ≥1µF low-ESR ceramic bypass to ground for stable operation |
| GND (Pin 2) | Power and signal reference | Must connect to solid ground plane to minimize noise and support thermal dissipation |
| SHDN (Pin 3) | Active-low enable control | CMOS-compatible input; threshold ~0.8V; must be driven - never left floating |
| C– (Pin 4) | Flying capacitor negative terminal | Connects to negative side of 1µF ceramic flying cap; polarity-sensitive - no tantalum/aluminum |
| VOUT (Pin 5) | Regulated output | Delivers 1.2V ±4%; requires ≥4.7µF low-ESR ceramic capacitor; disconnected from VIN in shutdown |
| C+ (Pin 6) | Flying capacitor positive terminal | Connects to positive side of 1µF ceramic flying cap; high dv/dt node - keep trace short and shielded |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor architecture | Eliminates magnetic components and associated EMI, enabling ultra-thin PCB designs with minimal BOM count (only three ceramics required) |
| Constant-frequency 1.5MHz operation | Enables predictable noise spectrum and simplified input/output filtering versus variable-frequency charge pumps |
| Burst Mode® efficiency optimization | Maintains >80% efficiency down to ~1mA load by cycling regulator bursts - critical for intermittent-sensing applications |
| Soft-start circuitry | Linearly ramps output current over ~500µs to prevent inrush-induced voltage droop on shared input rails |
| Integrated protection | Auto-recovering thermal shutdown (>160°C) and short-circuit current limit (~500mA) protect against fault conditions without external circuitry |
| Low-profile SOT-23-6 package | 1mm max height and 2.9mm × 1.6mm footprint fits dense portable layouts where height and area are constrained |
Applications
| Handheld Medical Instruments | Digital Cameras |
|---|---|
Use Scenario: Portable blood glucose meters or pulse oximeters powered by single Li-Ion cells requiring stable 1.2V for ADC and microcontroller cores. IC Role / Device Role / Timing Role: Primary step-down regulator converting 3.6V nominal battery to precision 1.2V rail with low noise and minimal quiescent draw. Use Value: Enables >300-hour battery life at 10µA average system current while maintaining ADC accuracy via low-output-ripple regulation. |
Use Scenario: Image sensor bias and ISP core supply in compact camera modules where board height is limited to <1.2mm. IC Role / Device Role / Timing Role: Fixed 1.2V power source for CMOS image sensor digital core and embedded processor subsystems. Use Value: Delivers 250mA peak current with <12mV ripple in Burst Mode®, eliminating need for inductors that would violate mechanical stack-up constraints. |
| Cellular Phones | Low-Power DSP Supplies |
Use Scenario: RF front-end bias or baseband processor I/O rail in legacy 2G/3G handsets using 3.7V Li-Ion batteries. IC Role / Device Role / Timing Role: Secondary regulated supply decoupled from main PMIC, providing clean 1.2V for analog transceiver sections. Use Value: Achieves 81% efficiency at 100mA load from 3.6V input - reducing thermal load vs. LDO alternatives and extending talk time. |
Use Scenario: Core voltage supply for TI TMS320C55x or ADI SHARC DSPs operating in low-power audio processing mode. IC Role / Device Role / Timing Role: Efficient, low-noise 1.2V source supporting dynamic voltage scaling during active/idle cycles. Use Value: 35µA quiescent current and <1µA shutdown current allow DSP to retain context during deep sleep without compromising wake latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar charge pump step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3251EDD-1.2#TRMPBF | Higher output current (500mA), spread-spectrum switching, lower IQ (9µA), DFN-8 package | Supports heavier loads and stricter EMI requirements; requires different PCB layout and thermal management | Choose when >250mA output or lower EMI is mandatory; not drop-in due to package and pinout change |
| LTC1911ES6-1.2#TRMPBF | Lower efficiency (~75%), higher IQ (180µA), same SOT-23-6 package but different pinout (no C–/C+ separation) | Limited to ≤150mA loads; less suitable for long-battery-life designs | Consider only if cost sensitivity outweighs efficiency and load requirements; pinout incompatible - redesign required |
Compared with LTC3250ES6-1.2#TRMPBF, LTC3251EDD-1.2#TRMPBF offers double the current and better light-load efficiency but demands layout revision, while LTC1911ES6-1.2#TRMPBF shares the SOT-23 footprint yet delivers significantly lower performance and cannot replace LTC3250ES6-1.2#TRMPBF without compromising system runtime or regulation stability.
Availability
LTC3250ES6-1.2#TRMPBF is available at Aetrix Electronics and suitable for handheld medical instruments, digital cameras, cellular phones, and low-power DSP supplies requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for LTC3250ES6-1.2#TRMPBF 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 acquired Linear Technology in 2017 and maintains its high-performance analog and power management portfolio with rigorous reliability testing and automotive/industrial qualification standards.
The LTC3250 series belongs to Linear's ultra-low-noise, inductorless DC/DC converter product line, designed specifically for space- and power-constrained portable electronics needing efficient, compact, and EMI-friendly voltage regulation without magnetics.
FAQ
What is the maximum continuous output current of the LTC3250ES6-1.2#TRMPBF?
The LTC3250ES6-1.2#TRMPBF delivers up to 250mA continuously under specified conditions (2.9V ≤ VIN ≤ 5V, TA = 25°C). Absolute maximum output current is rated at 350mA, but sustained operation above 250mA may trigger thermal shutdown depending on ambient temperature and PCB thermal design.
Does the LTC3250ES6-1.2#TRMPBF require external compensation components?
No, the LTC3250ES6-1.2#TRMPBF is fully integrated with internal compensation. Stability is ensured when using the recommended external capacitors: ≥1µF ceramic at VIN, ≥1µF ceramic for the flying capacitor (C+/C–), and ≥4.7µF low-ESR ceramic at VOUT. No resistors, op-amps, or additional capacitors are needed.
Can the LTC3250ES6-1.2#TRMPBF operate from a 2.7V input?
Yes, the LTC3250ES6-1.2#TRMPBF supports an input voltage range of 2.7V to 5.5V. At 2.7V input, it maintains regulation up to 150mA load (per Electrical Characteristics table); full 250mA capability requires VIN ≥ 2.9V.
What is the purpose of the C+ and C– pins on the LTC3250ES6-1.2#TRMPBF?
C+ and C– are dedicated terminals for the flying capacitor - a critical energy-transfer element in the charge pump topology. C+ connects to the positive side and C– to the negative side of a 1µF ceramic capacitor. These pins switch at 1.5MHz with high dv/dt and must be routed with short, symmetric traces to minimize EMI and ensure reliable operation.
Is the LTC3250ES6-1.2#TRMPBF RoHS-compliant and lead-free?
Yes, the LTC3250ES6-1.2#TRMPBF is RoHS-compliant and features lead-free (Pb-free) finish per JEDEC J-STD-020. The #TRMPBF suffix explicitly denotes tape-and-reel packaging with lead-free termination and compliance with EU RoHS Directive 2011/65/EU.
LTC3250ES6-1.2#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- -
- Current - Output:
- 250mA
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LTC3250ES6-1.2#TRMPBF FAQ
1.How can I place an order for LTC3250ES6-1.2#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3250ES6-1.2#TRMPBF 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 LTC3250ES6-1.2#TRMPBF reliable?
The price and inventory of LTC3250ES6-1.2#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3250ES6-1.2#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3250ES6-1.2#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3250ES6-1.2#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3250ES6-1.2#TRMPBF?
LTC3250ES6-1.2#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3250ES6-1.2#TRMPBF 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 LTC3250ES6-1.2#TRMPBF?
For technical support, including LTC3250ES6-1.2#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3250ES6-1.2#TRMPBF requirements.
6.How does Aetrix verify that LTC3250ES6-1.2#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3250ES6-1.2#TRMPBF 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 LTC3250ES6-1.2#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3250ES6-1.2#TRMPBF?
All LTC3250ES6-1.2#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3250ES6-1.2#TRMPBF, 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 LTC3250ES6-1.2#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3250ES6-1.2#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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