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Analog Devices Inc. LTC1754ES6-3.3#TRMPBF
- Part No.:
- LTC1754ES6-3.3#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6
- Datasheet:
-
LTC1754ES6-3.3#TRMPBF.pdf
- Description:
- IC REG CHARGE PUMP 3.3V TSOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC1754ES6-3.3#TRMPBF from Analog Devices (formerly Linear Technology) is a micropower regulated 3.3V charge pump DC/DC converter in a 6-pin SOT-23 package. It delivers up to 40mA output current from 2.5V–4.4V input, draws only 13µA quiescent current, features 600kHz internal oscillator, and provides ±4% output regulation - ideal for GSM SIM interface supplies and Li-ion battery backup systems.
For engineers reviewing the LTC1754ES6-3.3#TRMPBF datasheet, LTC1754ES6-3.3#TRMPBF pinout, LTC1754ES6-3.3#TRMPBF application, or LTC1754ES6-3.3#TRMPBF equivalent, key selection criteria include input voltage range (2.0V–4.4V), shutdown current (<1µA), output ripple (23mVP-P at 40mA), thermal protection, and SOT-23 footprint compatibility with space-constrained portable designs.
Technical Context
The LTC1754ES6-3.3#TRMPBF operates as a Burst Mode™ switched-capacitor voltage doubler with hysteresis-based regulation: an internal comparator monitors a resistor-divided VOUT and enables the charge pump when voltage drops below the lower trip point. The 600kHz free-running oscillator drives nonoverlapping clock phases to charge the flying capacitor (CFLY) on phase one and stack it with VIN on phase two.
During shutdown, the SHDN pin (CMOS input, VIH = 1.4V, VIL = 0.3V) disconnects VOUT from VIN and reduces supply current to <1µA. Built-in short-circuit and overtemperature protection (trip at ~150°C, hysteresis ~10°C) allows indefinite fault survival without latchup, while ultralow 13µA operating current ensures >82% efficiency even at 20mA load from 2.0V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±4% (3.17–3.43V), tightly regulated across 2.0V–4.4V input and 0–40mA load |
| Input Voltage Range | 2.0V to 4.4V - supports single-cell Li-ion (2.7–4.2V), NiCd/NiMH (2.0–3.0V), and low-voltage logic rails |
| Max Output Current | 40mA at VIN ≥ 2.5V - sufficient for SIM card interfaces, smart card readers, and low-power MCU peripherals |
| Quiescent Current | 13µA typical - enables multi-year battery life in always-on backup supplies and handheld computers |
| Shutdown Current | <1µA - isolates load from VIN during sleep, eliminating reverse leakage paths |
| Switching Frequency | 600kHz - enables use of small 1µF ceramic flying capacitor and minimizes EMI in RF-sensitive GSM modules |
| Output Ripple | 23mVP-P at VIN=2.5V, IOUT=40mA - manageable with 10µF low-ESR tantalum or ceramic output capacitor |
| Protection Features | Short-circuit and overtemperature - cycles safely between shutdown and operation without damage or reset |
Pinout & Package
Package: 6-lead plastic SOT-23 (SC-74A), 2.80–3.00mm × 1.90mm × 1.15mm, JEDEC MO-178 compatible, rated for –40°C to 85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Regulated 3.3V output | Must be bypassed with ≥6.8µF low-ESR capacitor; supplies critical loads like SIM interface or white LED bias |
| GND (Pin 2) | Power ground reference | Requires direct connection to solid ground plane to minimize noise coupling and ensure thermal stability |
| SHDN (Pin 3) | Active-low shutdown control | CMOS-compatible input; must not float; pulls VOUT high-impedance and cuts VIN-to-VOUT path when low |
| C– (Pin 4) | Flying capacitor negative terminal | Connects to negative side of 1µF ceramic CFLY; forms charge-transfer node in doubler topology |
| VIN (Pin 5) | Input supply (2.0–4.4V) | Bypass with ≥6.8µF low-ESR capacitor; source impedance must be minimized to avoid startup inrush issues |
| C+ (Pin 6) | Flying capacitor positive terminal | Connects to positive side of 1µF ceramic CFLY; alternately charges from VIN and discharges into VOUT |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor architecture | Eliminates magnetic components and EMI concerns - enables 0.052 in² total PCB area with only three external capacitors |
| Ultralow 13µA operating current | Extends battery runtime in always-on applications such as smart card readers and PCMCIA local supplies |
| Internal 600kHz oscillator | Removes need for external timing components; ensures consistent switching behavior across temperature and process variation |
| Load-disconnect shutdown | Prevents backfeed from VOUT to VIN during sleep - essential for battery backup integrity and system-level power sequencing |
| Thermal shutdown with hysteresis | Enables safe continuous operation under short-circuit conditions without external supervision or reset circuitry |
| ±4% output voltage tolerance | Meets GSM SIM interface spec (3.0–3.6V) and Li-ion backup requirements without post-regulation filtering |
Applications
| Smart Card Readers | GSM SIM Interface Supplies |
|---|---|
Use Scenario: Powering ISO 7816-compliant smart cards in portable payment terminals and access control devices. IC Role / Device Role / Timing Role: Provides stable 3.3V supply to card VCC pin during active communication; manages power sequencing via SHDN control. Use Value: Delivers 40mA peak current within ±4% regulation while consuming only 13µA idle current - enabling multi-week operation on coin-cell batteries. | Use Scenario: Generating regulated 3.3V for SIM card interface in dual-mode GSM/GPRS handsets. IC Role / Device Role / Timing Role: Acts as dedicated SIM supply, isolated from noisy RF/baseband domains; enabled only during call/data sessions via SHDN. Use Value: Achieves <1µA shutdown current and 23mVP-P ripple - preventing SIM reset errors and meeting ETSI TR 102 207 immunity requirements. |
| Li-Ion Battery Backup Supplies | Handheld Computers |
Use Scenario: Maintaining real-time clock (RTC) and SRAM state during main power loss in portable medical or industrial loggers. IC Role / Device Role / Timing Role: Serves as autonomous backup regulator, activated by low-battery detection circuitry driving SHDN. Use Value: Supports 2.0V minimum input - fully utilizes depleted Li-ion cells down to 2.0V, extending backup duration by >30% vs. higher-VIN alternatives. | Use Scenario: Supplying 3.3V to low-power microcontrollers and sensors in ruggedized PDAs and field data collectors. IC Role / Device Role / Timing Role: Primary 3.3V rail generator from single-cell battery; integrated thermal protection prevents overheating during extended GPS/WiFi use. Use Value: 0.052 in² solution size and SOT-23 footprint allow placement near processor - reducing trace inductance and improving transient response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar regulated charge pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1517-3.3 | 6µA quiescent current (vs. 13µA), 20mA max output (vs. 40mA), same SOT-23-6 package | Lower power but reduced drive capability - suitable only for ultra-low-current SIM or RTC backup, not for 40mA loads | Select LTC1517-3.3 only if system load ≤20mA and lowest possible IQ is mandatory; LTC1754ES6-3.3#TRMPBF preferred for full-spec SIM or smart card support. |
| LTC1522 | 6µA IQ, 20mA output, 3.3V fixed output, identical pinout and footprint | Same functional scope but halved current rating - cannot replace LTC1754ES6-3.3#TRMPBF in 40mA applications without derating or redesign | Use LTC1522 only in new designs targeting <20mA loads; LTC1754ES6-3.3#TRMPBF remains necessary where 40mA capability is required per GSM or PCMCIA specs. |
Compared with LTC1517-3.3 and LTC1522, the LTC1754ES6-3.3#TRMPBF trades slightly higher quiescent current for double the output drive (40mA vs. 20mA), making it the only option among the three that meets full GSM SIM interface and PCMCIA local supply current requirements without external buffering.
Availability
LTC1754ES6-3.3#TRMPBF is available at Aetrix Electronics and suitable for GSM cellular telephones, smart card readers, and handheld computers requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LTC1754ES6-3.3#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 full product support, documentation, and manufacturing continuity for legacy Linear parts including the LTC1754 series.
The LTC1754 product line was designed specifically for micropower, inductorless DC/DC conversion in battery-powered portable electronics - emphasizing ultra-low IQ, small solution size, and robust fault protection for SIM, LED, and backup supply roles.
FAQ
What is the minimum input voltage required for the LTC1754ES6-3.3#TRMPBF to deliver its full 40mA output?
The LTC1754ES6-3.3#TRMPBF requires VIN ≥ 2.5V to sustain 40mA output current while maintaining regulation within ±4%. Below 2.5V, output current capability degrades linearly; at 2.0V input, maximum rated output is 20mA. This threshold ensures adequate headroom for the charge pump's voltage-doubling action and internal dropout losses.
Does the LTC1754ES6-3.3#TRMPBF require external compensation components?
No, the LTC1754ES6-3.3#TRMPBF is internally compensated and requires no external resistors or capacitors for loop stability. Its hysteresis-based regulation architecture eliminates the need for traditional feedback compensation networks - only three external capacitors (CIN, COUT, CFLY) are mandatory for operation.
Can the LTC1754ES6-3.3#TRMPBF be used with ceramic flying capacitors?
Yes, the LTC1754ES6-3.3#TRMPBF is explicitly designed for ceramic flying capacitors: a 1µF X7R or C0G ceramic capacitor is recommended for CFLY. Ceramic types provide stable capacitance over temperature and low ESR, ensuring predictable charge transfer and minimal output ripple - unlike electrolytic or tantalum alternatives.
How does the LTC1754ES6-3.3#TRMPBF behave during a VOUT short-circuit condition?
During a VOUT-to-GND short, the LTC1754ES6-3.3#TRMPBF limits output current to ~118mA (typical) and enters thermal shutdown when junction temperature exceeds ~150°C. It then cycles autonomously - disabling the charge pump until die temperature falls to ~140°C - allowing indefinite fault survival without damage or external intervention.
Is the LTC1754ES6-3.3#TRMPBF pin-compatible with other SOT-23 charge pumps like the LTC1517-3.3?
Yes, the LTC1754ES6-3.3#TRMPBF shares identical pinout (VOUT, GND, SHDN, C–, VIN, C+) and SOT-23-6 package dimensions with LTC1517-3.3 and LTC1522. However, due to its higher 40mA output rating and different internal current-limit thresholds, direct substitution requires verification of load current and thermal margins in the target application.
LTC1754ES6-3.3#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2V
- Voltage - Input (Max):
- 4.4V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 40mA
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LTC1754ES6-3.3#TRMPBF FAQ
1.How can I place an order for LTC1754ES6-3.3#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1754ES6-3.3#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 LTC1754ES6-3.3#TRMPBF reliable?
The price and inventory of LTC1754ES6-3.3#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1754ES6-3.3#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC1754ES6-3.3#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1754ES6-3.3#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1754ES6-3.3#TRMPBF?
LTC1754ES6-3.3#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1754ES6-3.3#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 LTC1754ES6-3.3#TRMPBF?
For technical support, including LTC1754ES6-3.3#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1754ES6-3.3#TRMPBF requirements.
6.How does Aetrix verify that LTC1754ES6-3.3#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC1754ES6-3.3#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 LTC1754ES6-3.3#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC1754ES6-3.3#TRMPBF?
All LTC1754ES6-3.3#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1754ES6-3.3#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 LTC1754ES6-3.3#TRMPBF part is unused and in its original packaging.
Return procedure for LTC1754ES6-3.3#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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