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Analog Devices Inc. LTC3260IMSE#TRPBF
- Part No.:
- LTC3260IMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3260IMSE#TRPBF.pdf
- Description:
- IC REG CHARGE PUMP INV DL 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,812
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Product details
Overview
LTC3260IMSE#TRPBF from Analog Devices is a low-noise dual-polarity power supply IC integrating an inverting charge pump and two independent LDO regulators. It accepts 4.5V–32V input, delivers ±12V outputs from a single 15V source, supports up to 100mA charge pump output and 50mA per LDO, and operates in programmable constant-frequency (50–500kHz) or ultra-low-quiescent Burst Mode (100µA with both LDOs on). It targets precision analog biasing in portable instrumentation.
For engineers reviewing the LTC3260IMSE#TRPBF datasheet, LTC3260IMSE#TRPBF pinout, LTC3260IMSE#TRPBF application, or LTC3260IMSE#TRPBF equivalent, key selection criteria include bipolar output noise performance (100µVRMS), LDO dropout voltage (400mV/200mV), MODE-selectable operation mode, RT-programmable oscillator frequency, and thermal-enhanced 16-pin MSOP package compatibility with industrial and automotive temperature ranges.
Technical Context
The LTC3260IMSE#TRPBF implements a two-stage architecture: a switched-capacitor inverting charge pump (VOUT = –VIN in constant-frequency mode; –0.94·VIN in Burst Mode) feeding a negative LDO– regulator, while a positive LDO+ draws directly from VIN. Its internal 1.2V/–1.2V references enable precise resistor-divider programming of both LDO outputs.
It features dual independent enable logic (EN+ for LDO+, EN– for charge pump + LDO–), MODE pin selection between hysteretic Burst Mode and fixed-frequency open-loop inversion, and RT pin-based oscillator frequency control via external resistor. Thermal shutdown (>175°C) and short-circuit current limiting (~160mA) are integrated.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5V to 32V - supports wide-input industrial and automotive supplies without pre-regulation. |
| Charge Pump Output | Up to 100mA at –VIN (constant freq) or –0.94·VIN (Burst Mode) - enables high-current negative rail generation. |
| LDO+ / LDO– Output Current | 50mA each - sufficient for op-amp biasing, ADC/DAC reference supplies, and sensor excitation. |
| Quiescent Current | 100µA with both LDOs active in Burst Mode - extends battery life in portable medical devices. |
| Oscillator Frequency | Programmable 50kHz–500kHz via RT resistor - allows trade-off between ripple, efficiency, and EMI. |
| LDO Output Noise | 100µVRMS (with 10nF BYP+/- bypass) - meets low-noise requirements for precision signal chains. |
| Operating Temperature | –40°C to 125°C - qualified for extended industrial and automotive under-hood applications. |
Pinout & Package
Package: 16-lead plastic MSOP (MSE), 0.75mm profile, exposed pad (Pin 17) connected to GND for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN+ | LDO+ Enable Input | Logic-high enables positive LDO; soft-start limits inrush current during turn-on. |
| RT | Oscillator Frequency Programming | Resistor to GND sets switching frequency (50–500kHz); grounded = 500kHz default. |
| BYP– | LDO– Reference Bypass | 10nF capacitor reduces LDO– output noise by bypassing internal –1.2V reference. |
| ADJ– | LDO– Feedback Input | Serves at –1.2V; used with external resistor divider to set VLDO– = –1.2V × (R1/R2 + 1). |
| LDO– | Negative LDO Output | Supplies stable negative rail up to –32V; requires ≥2µF low-ESR ceramic output capacitor. |
| VOUT | Charge Pump Output | Drives LDO– input; regulated to –VIN (MODE = low) or –0.94·VIN (MODE = high). |
| C– / C+ | Flying Capacitor Terminals | Switched nodes delivering charge; require low-ESR ceramic flying capacitor (≥1µF). |
| VIN | Main Power Input | Supplies LDO+ and charge pump; must be bypassed with ≥2µF low-ESR ceramic capacitor. |
| LDO+ | Positive LDO Output | Supplies stable positive rail up to +32V; requires ≥2µF low-ESR ceramic output capacitor. |
| EN– | Charge Pump & LDO– Enable | Logic-high activates charge pump and LDO–; controls entire negative supply chain. |
| MODE | Operation Mode Select | High = Burst Mode (low IQ, higher ripple); Low = constant-frequency (lower ripple, higher IQ). |
| ADJ+ | LDO+ Feedback Input | Serves at +1.2V; used with external resistor divider to set VLDO+ = 1.2V × (R1/R2 + 1). |
| BYP+ | LDO+ Reference Bypass | 10nF capacitor reduces LDO+ output noise by bypassing internal +1.2V reference. |
| GND | Ground Reference | Exposed pad (Pin 17) must be soldered to PCB ground plane for thermal performance and stability. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDO regulation | Separate EN+/EN– control and ADJ+/ADJ– feedback allow asymmetric rail configuration and independent sequencing. |
| Burst Mode + constant-frequency selection | MODE pin toggles between 100µA quiescent operation (Burst) and low-ripple fixed-frequency (50–500kHz) modes. |
| Low-noise bipolar output | 100µVRMS output noise (with BYP+/- caps) and >60dB LDO rejection of VOUT ripple enable clean analog biasing. |
| Robust protection suite | Integrated short-circuit current limit (~160mA), thermal shutdown (>175°C), and undervoltage lockout (3.4V–4.0V). |
| Ceramic-capacitor compatible | Stable with ≥2µF low-ESR ceramic capacitors on all outputs - eliminates need for bulkier, higher-ESR alternatives. |
Applications
| Portable Medical Equipment | Industrial Instrumentation |
|---|---|
Use Scenario: Battery-powered ECG front-end requiring ultra-low-noise ±5V rails for precision amplifiers and ADC drivers. IC Role / Device Role / Timing Role: Generates clean, matched bipolar supplies from a single Li-ion cell (3.3V–4.2V) or 12V system rail. Use Value: 100µVRMS noise and 60dB+ ripple rejection preserve signal integrity in sub-µV biopotential measurements. |
Use Scenario: Handheld multimeter or data logger needing isolated ±12V rails for op-amp input stages and reference buffers. IC Role / Device Role / Timing Role: Replaces discrete charge pump + linear regulator combinations with single-chip solution. Use Value: 16-pin MSOP footprint and integrated soft-start simplify layout while meeting AEC-Q100-qualified reliability. |
| Low-Noise Bias Generators | Portable Test & Measurement |
Use Scenario: Precision DAC/ADC evaluation board requiring low-drift, low-noise ±10V reference supplies. IC Role / Device Role / Timing Role: Provides independently adjustable LDO+ and LDO– outputs with <0.03mV/mA load regulation. Use Value: ADJ+/ADJ– resistor dividers enable exact rail matching; BYP+/- bypass caps suppress reference noise floor. |
Use Scenario: Field-deployable oscilloscope probe amplifier needing compact, thermally robust ±15V supplies. IC Role / Device Role / Timing Role: Delivers 50mA per rail from 24V input using thermally enhanced MSOP package with exposed GND pad. Use Value: θJA = 43°C/W and –40°C to 125°C rating ensure stable operation in uncontrolled ambient environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-polarity supply applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1044CSA+ | Single-stage inverting charge pump only (no integrated LDOs); fixed 10kHz switching; no Burst Mode; max 20mA output. | Requires external LDOs for low-noise regulation; unsuitable for >20mA loads or low-IQ battery operation. | Select when cost-sensitive, low-current, and simplicity outweigh noise/performance requirements. |
| LT3467EDD#TRPBF | Boost + inverting buck-boost controller (not integrated LDOs); requires external MOSFETs, inductors, and regulators; higher component count. | Supports higher output currents (>100mA) but lacks monolithic noise performance and ease of use. | Select when >100mA bipolar rails or wider input range (2.7V–25V) justify added design complexity and BOM cost. |
Compared with MAX1044CSA+ and LT3467EDD#TRPBF, the LTC3260IMSE#TRPBF uniquely integrates charge pump, positive/negative LDOs, and low-noise design in one MSOP package-enabling compact, low-component-count, high-PSRR bipolar supplies without external pass elements or magnetics.
Availability
LTC3260IMSE#TRPBF is available at Aetrix Electronics and suitable for portable medical equipment, industrial instrumentation, and low-noise bias generators requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3260IMSE#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 precision, industrial, automotive, and communications markets.
The LTC3260 belongs to Analog Devices' µPower DC/DC converter product line, designed specifically for low-noise, dual-rail power generation in space-constrained, battery-sensitive, and high-accuracy analog systems.
FAQ
What is the maximum output current capability of the LTC3260IMSE#TRPBF charge pump stage?
The LTC3260IMSE#TRPBF charge pump delivers up to 100mA of output current into VOUT in constant-frequency mode. This current feeds the LDO– regulator and must account for LDO– dropout and load demand. The actual deliverable current depends on input voltage, oscillator frequency, and flying capacitor value - with higher fOSC and larger CFLY improving effective output strength.
How does the MODE pin affect the LTC3260IMSE#TRPBF's output voltage accuracy and ripple?
When MODE = high, the LTC3260IMSE#TRPBF enters Burst Mode, regulating VOUT to –0.94·VIN with ~2% hysteresis - resulting in higher output ripple but only 100µA quiescent current. When MODE = low, it operates in constant-frequency mode, delivering precisely –VIN with significantly lower ripple (determined by COUT and fOSC), at the cost of higher quiescent current.
Can the LTC3260IMSE#TRPBF generate asymmetric output voltages such as +5V and –12V?
Yes. The LTC3260IMSE#TRPBF supports independent programming of LDO+ and LDO– outputs via separate ADJ+ and ADJ– resistor dividers. For example, VLDO+ = +5V is set using R1/R2 yielding 1.2V × (R1/R2 + 1) = 5V, while VLDO– = –12V uses R1/R2 yielding –1.2V × (R1/R2 + 1) = –12V - enabling fully asymmetric bipolar rails.
What is the role of the BYP+ and BYP– pins on the LTC3260IMSE#TRPBF?
The BYP+ and BYP– pins connect to the internal +1.2V and –1.2V reference buffers. Adding a 10nF capacitor from each to GND bypasses these references, reducing LDO+ and LDO– output voltage noise to 100µVRMS. Leaving them floating degrades noise performance but maintains basic regulation functionality.
Is the LTC3260IMSE#TRPBF pin-compatible with other variants in the LTC3260 family?
Yes. The LTC3260IMSE#TRPBF shares identical pinout and functionality with all 16-pin MSOP variants (e.g., LTC3260EMSE#TRPBF, LTC3260HMSE#TRPBF), differing only in temperature grade and qualification level. All MSE-package parts use the same 16-pin layout, exposed GND pad, and electrical interface - enabling drop-in replacement within rated temperature limits.
LTC3260IMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Topology:
- Charge Pump
- Number of Outputs:
- 1
- Frequency - Switching:
- 50kHz ~ 500kHz
- Voltage/Current - Output 1:
- Adj, 100mA
- Voltage/Current - Output 2:
- -
- Voltage/Current - Output 3:
- -
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 4.5V ~ 32V
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LTC3260IMSE#TRPBF FAQ
1.How can I place an order for LTC3260IMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3260IMSE#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 LTC3260IMSE#TRPBF reliable?
The price and inventory of LTC3260IMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3260IMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3260IMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3260IMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3260IMSE#TRPBF?
LTC3260IMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3260IMSE#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 LTC3260IMSE#TRPBF?
For technical support, including LTC3260IMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3260IMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3260IMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3260IMSE#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 LTC3260IMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3260IMSE#TRPBF?
All LTC3260IMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3260IMSE#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 LTC3260IMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3260IMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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