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Analog Devices Inc. LTC1983ES6-3#TRMPBF
- Part No.:
- LTC1983ES6-3#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC1983ES6-3#TRMPBF.pdf
- Description:
- IC REG CHARGE PUMP -3V TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:8,884
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Product details
Overview
LTC1983ES6-3#TRMPBF from Analog Devices (formerly Linear Technology) is a -3V, 100mA regulated inverting charge-pump DC/DC converter in a 6-pin TSOT-23 package. It operates from 2.3V to 5.5V input, delivers ±4% output voltage accuracy, features 25µA typical quiescent current, and supports both regulated output and open-loop -VIN inversion modes. It is used in single-supply portable systems requiring compact, low-noise negative bias.
For engineers reviewing the LTC1983ES6-3#TRMPBF datasheet, LTC1983ES6-3#TRMPBF pinout, LTC1983ES6-3#TRMPBF application, or LTC1983ES6-3#TRMPBF equivalent, key selection criteria include output impedance (11Ω at VIN=3.3V), shutdown current (<1µA), 900kHz internal oscillator, thermal/short-circuit protection, and compatibility with ceramic flying/output capacitors (CFLY=1µF, COUT=10µF).
Technical Context
The LTC1983ES6-3#TRMPBF uses a two-phase nonoverlapping switched-capacitor topology with internal comparator-based hysteresis control to regulate VOUT at –3V. Regulation occurs by enabling the charge pump when VOUT droops above the upper trip point of COMP1 and disabling it upon reaching the lower trip point.
It integrates an internal 900kHz oscillator, fixed resistor divider for feedback sensing, and logic-controlled MOSFET switches (S1A/S1B/S2A/S2B). The SHDN pin enables zero-current shutdown with ~0.7V threshold, and thermal protection cycles operation between ~155°C shutdown and ~145°C restart during sustained overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | –3.0V ±4% (–2.88V to –3.12V) under regulation; ensures stable bias for analog circuitry requiring precise negative rail |
| Max Output Current | 100mA DC continuous; supports moderate-load applications like LCD bias or GaAs FET gate drive |
| Input Voltage Range | 2.3V to 5.5V; compatible with Li-ion, USB, and 3.3V/5V system rails without external LDO pre-regulation |
| Quiescent Current | 25µA typical (VIN ≤ 5.5V, IOUT = 0, SHDN = VIN); enables multi-year battery life in always-on portable devices |
| Oscillator Frequency | 900kHz typical; determines switching period (≈1.11µs) and influences capacitor sizing and ripple spectrum |
| Shutdown Current | <1µA (SHDN = 0V); eliminates standby power loss in sleep-mode systems |
| Output Ripple | 60mVP-P max (3.3V ≤ VIN ≤ 5.5V, COUT = 10µF ceramic); meets noise-sensitive analog supply requirements |
| Open-Loop Impedance | 11Ω (VIN = 3.3V, VOUT = –3V); defines load regulation slope and minimum input voltage for regulation |
Pinout & Package
Package: 6-lead plastic TSOT-23 (ThinSOT), 1mm height, JEDEC MO-193 compliant, footprint compatible with SOT-23 but with tighter pitch and thinner profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Positive input supply connection | Accepts 2.3V–5.5V; requires ≥4.7µF low-ESR bypass capacitor close to pin to suppress inrush transients |
| VOUT (Pin 2) | Regulated negative output terminal | Delivers –3V ±4%; must be bypassed with ≥4.7µF low-ESR capacitor to maintain regulation and minimize ripple |
| C+ (Pin 3) | Flying capacitor positive node | Switched between VIN and GND; connects to top plate of CFLY; tied to VCC during shutdown |
| C– (Pin 4) | Flying capacitor negative node | Switched between GND and VOUT; connects to bottom plate of CFLY; tied to GND during shutdown |
| GND (Pin 5) | Signal and power ground reference | Must connect to low-impedance ground plane; serves as return path for all internal and external currents |
| SHDN (Pin 6) | Logic-controlled enable/disable input | Drives high (≥1.1V) to enable; grounded to shut down; threshold ≈0.7V; must not float or exceed VIN |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 25µA typical operating current enables >10-year battery life in coin-cell-powered IoT sensors |
| Zero-current shutdown mode | <1µA shutdown current allows complete power gating in firmware-controlled sleep states |
| Integrated thermal protection | Auto-cycling between ~155°C shutdown and ~145°C restart prevents permanent damage during sustained short circuits |
| Fixed -3V output with ±4% accuracy | Eliminates need for external feedback resistors or trimming, reducing BOM count and layout area |
| Internal 900kHz oscillator | Removes external timing components, simplifies design, and avoids EMI from variable-frequency operation |
| Robust short-circuit protection | Indefinite short-circuit duration tolerance without latch-up ensures field reliability in unattended equipment |
Applications
| Portable Medical Sensors | LCD Display Bias Supplies |
|---|---|
Use Scenario: Battery-powered handheld glucose meters and pulse oximeters requiring stable –3V rail for op-amp signal conditioning and ADC reference. IC Role / Device Role / Timing Role: Provides regulated negative supply for precision analog front-end ICs; no external clock required due to integrated 900kHz oscillator. Use Value: 25µA quiescent current extends CR2032 battery life beyond 5 years; ±4% output accuracy ensures consistent sensor calibration across temperature. | Use Scenario: Small-format TFT-LCD modules in wearables and industrial HMIs needing dual-rail bias (e.g., VGL = –3V) for gate driver ICs. IC Role / Device Role / Timing Role: Generates clean –3V from single 3.3V system rail; low 60mVP-P ripple prevents visible display artifacts. Use Value: TSOT-23 package fits tight board space; 100mA output supports multiple gate lines; thermal protection guards against panel fault conditions. |
| GaAs FET RF Biasing | Single-Supply Op-Amp Systems |
Use Scenario: Low-power RF front-ends in IoT transceivers using GaAs pHEMT amplifiers requiring precise negative gate bias (e.g., –2.8V to –3.2V). IC Role / Device Role / Timing Role: Delivers tightly regulated –3V with minimal load-dependent droop; open-loop mode provides –VIN inversion if needed for dynamic bias adjustment. Use Value: 11Ω output impedance ensures <100mV droop at 10mA gate current; shutdown pin enables fast RF stage power cycling. | Use Scenario: Industrial sensor signal conditioners using rail-to-rail op-amps that require symmetric ±3V supplies from a single 3.3V or 5V source. IC Role / Device Role / Timing Role: Generates –3V complement to existing +3.3V rail; internal hysteresis control maintains regulation without external compensation. Use Value: Eliminates need for discrete inductor-based inverter; ±4% accuracy matches op-amp input offset specs; low ESR capacitor support reduces total solution size. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inverting charge-pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1983ES6-3#TRPBF | Same die, identical electrical specs, but supplied in standard 2500-unit tape-and-reel (vs. 500-unit #TRMPBF) | No functional difference; suited for high-volume production rather than prototyping or low-MOQ orders | Select #TRMPBF for evaluation or small-batch builds; choose #TRPBF for full production runs requiring standard reel quantities |
| LTC1754ES6-3#TRMPBF | Lower IQ (13µA), 50mA output, same TSOT-23 package; lacks open-loop –VIN mode and has different ROUT (15Ω) | Better for ultra-low-power sub-50mA loads; unsuitable for applications requiring >50mA or open-loop inversion | Choose LTC1754ES6-3#TRMPBF only if load current ≤50mA and lowest possible standby current is critical |
Compared with LTC1983ES6-3#TRMPBF, the #TRPBF variant offers identical performance in larger reels for cost-efficient manufacturing, while LTC1754ES6-3#TRMPBF trades output current and operational flexibility for reduced quiescent consumption-making it viable only in constrained low-load scenarios.
Availability
LTC1983ES6-3#TRMPBF is available at Aetrix Electronics and suitable for portable medical sensors, LCD bias supplies, GaAs FET biasing, and single-supply op-amp systems requiring stable component supply with guaranteed long-term continuity.
Supply support for LTC1983ES6-3#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 its high-performance analog IC portfolio, emphasizing precision, power efficiency, and reliability for demanding industrial and portable applications.
The LTC1983 series was designed specifically for space-constrained, battery-operated systems needing regulated negative voltage generation without inductors-targeting portable instrumentation, display bias, and RF bias applications.
FAQ
What is the maximum continuous output current of the LTC1983ES6-3#TRMPBF?
The LTC1983ES6-3#TRMPBF delivers up to 100mA of continuous DC output current at –3V under specified thermal conditions (TA ≤ 85°C, proper PCB layout). Absolute maximum output current is 125mA, but sustained operation above 100mA may trigger thermal shutdown depending on ambient temperature and copper area. The device's 11Ω open-loop output impedance limits regulation margin at higher loads.
Does the LTC1983ES6-3#TRMPBF require external feedback resistors to set the output voltage?
No, the LTC1983ES6-3#TRMPBF does not require external feedback resistors. It features an internal resistor divider and reference circuit that fixes the regulated output at –3.0V ±4%. This eliminates component count, saves board space, and ensures consistent accuracy without trimming-unlike adjustable charge pumps such as the LTC1515 or LTC1751.
Can the LTC1983ES6-3#TRMPBF operate in open-loop mode to generate –VIN?
Yes, the LTC1983ES6-3#TRMPBF automatically enters open-loop mode when the regulation condition is unmet-specifically when VIN – 3.06V ≤ IOUT × ROUT. In this mode, it functions as a low-impedance inverter delivering VOUT ≈ –(VIN – IOUT × ROUT), enabling flexible bias generation without external control logic.
What is the recommended flying capacitor value for the LTC1983ES6-3#TRMPBF?
The recommended flying capacitor (CFLY) value for the LTC1983ES6-3#TRMPBF is 1µF ceramic (X5R or better dielectric), as validated in the datasheet's typical applications and performance curves. Smaller values (0.01µF–0.047µF) reduce ripple at very light loads but sacrifice output current capability and efficiency; larger values (>1µF) increase ripple unless COUT is also increased proportionally.
How does the LTC1983ES6-3#TRMPBF handle thermal overload conditions?
The LTC1983ES6-3#TRMPBF incorporates on-chip thermal shutdown that disables the charge pump when junction temperature exceeds ≈155°C and re-enables it once temperature falls to ≈145°C. This auto-cycling behavior continues indefinitely without latch-up or damage, providing robust protection during output shorts or excessive ambient temperatures-critical for unattended portable equipment.
LTC1983ES6-3#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:
- Negative
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- -3V
- Voltage - Output (Max):
- -
- Current - Output:
- 100mA
- Frequency - Switching:
- 900kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LTC1983ES6-3#TRMPBF FAQ
1.How can I place an order for LTC1983ES6-3#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1983ES6-3#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 LTC1983ES6-3#TRMPBF reliable?
The price and inventory of LTC1983ES6-3#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1983ES6-3#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC1983ES6-3#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1983ES6-3#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1983ES6-3#TRMPBF?
LTC1983ES6-3#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1983ES6-3#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 LTC1983ES6-3#TRMPBF?
For technical support, including LTC1983ES6-3#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1983ES6-3#TRMPBF requirements.
6.How does Aetrix verify that LTC1983ES6-3#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC1983ES6-3#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 LTC1983ES6-3#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC1983ES6-3#TRMPBF?
All LTC1983ES6-3#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1983ES6-3#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 LTC1983ES6-3#TRMPBF part is unused and in its original packaging.
Return procedure for LTC1983ES6-3#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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