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Analog Devices Inc. LTC1983ES6-5#TRPBF
- Part No.:
- LTC1983ES6-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC1983ES6-5#TRPBF.pdf
- Description:
- IC REG CHARGE PUMP -5V TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,145
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Product details
Overview
LTC1983ES6-5#TRPBF from Analog Devices (formerly Linear Technology) is a regulated inverting charge-pump DC/DC converter delivering –5V ±4% at up to 100mA output current. It operates from 2.3V to 5.5V input, features internal 900kHz oscillator, 25µA typical quiescent current, and zero-current shutdown via SHDN pin. Used for GaAs FET bias, LCD negative supplies, and single-supply system level shifting.
For engineers reviewing the LTC1983ES6-5#TRPBF datasheet, LTC1983ES6-5#TRPBF pinout, LTC1983ES6-5#TRPBF application, or LTC1983ES6-5#TRPBF equivalent, key selection criteria include regulated –5V output accuracy, open-loop –VIN inversion capability, thermal/short-circuit protection, ThinSOT-23 package footprint, and compatibility with low-ESR ceramic flying/output capacitors.
Technical Context
The LTC1983ES6-5#TRPBF uses a two-phase nonoverlapping clock to drive internal charge pump switches (S1A/S1B/S2A/S2B), enabling voltage inversion through C+ and C– terminals. Regulation is achieved by sensing VOUT via an internal resistor divider and enabling the pump only when output droops beyond hysteresis thresholds of COMP1.
In open-loop mode-triggered when VIN – 5.06V ≤ IOUT × ROUT-the device acts as a low-impedance inverter with VOUT = –[VIN – (IOUT × ROUT)], where ROUT is 8.5Ω (VIN = 5V, IOUT ≈ 60mA) or 11Ω (VIN = 3.3V, IOUT ≈ 50mA). Shutdown disables all circuitry, reducing VIN current to <1µA and disconnecting VOUT from CFLY and VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | –5V ±4% (regulated mode, VIN ≥ 5V, IOUT ≤ 100mA); enables precise negative rail generation without external feedback. |
| Max Output Current | 100mA DC (continuous, regulated mode); supports moderate-power analog biasing and display supplies. |
| Input Voltage Range | 2.3V to 5.5V; compatible with Li-ion, USB, and 3.3V/5V logic rails without pre-regulation. |
| Quiescent Current | 25µA typical (active mode); maintains high light-load efficiency in battery-powered portable systems. |
| Oscillator Frequency | 900kHz (free-running, non-Burst Mode®); enables compact 1µF ceramic flying capacitor and reduces EMI compared to lower-frequency pumps. |
| Shutdown Current | <1µA (SHDN = 0V); achieves true zero-power state for ultra-low-power sleep modes. |
| Output Ripple | 60mVP-P (VIN = 3.3–5.5V, IOUT = 100mA, COUT = 10µF ceramic); meets noise-sensitive analog supply requirements with proper capacitor selection. |
| Protection Features | Short-circuit and over-temperature (≈155°C trip, ≈145°C recovery); ensures robust operation under fault conditions without latch-up. |
Pinout & Package
Package: 6-lead Plastic TSOT-23 (ThinSOT™), 1mm height, JEDEC MO-193 compliant, 1.90mm × 2.80mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Charge pump input supply | Accepts 2.3V–5.5V; requires ≥4.7µF low-ESR bypass capacitor near pin to suppress inrush transients during switching. |
| VOUT (Pin 2) | Regulated negative output | Delivers –5V ±4%; must be bypassed with ≥4.7µF low-ESR capacitor to stabilize regulation and minimize ripple. |
| C+ (Pin 3) | Flying capacitor positive terminal | Switched between VIN and GND; connects to top plate of CFLY; layout critical to minimize loop inductance. |
| C– (Pin 4) | Flying capacitor negative terminal | Switched between GND and VOUT; connects to bottom plate of CFLY; shares return path with VOUT capacitor ground. |
| GND (Pin 5) | Signal and power ground | Common reference for all internal circuits; must connect directly to low-impedance ground plane for stability and EMI control. |
| SHDN (Pin 6) | Enable/shutdown control | Logic-high (≥1.1V) enables operation; logic-low (≤0.3V) forces full shutdown; must not float or exceed VIN. |
Key Features
| Feature | Design Value |
|---|---|
| Regulated –5V output | ±4% accuracy over temperature and load ensures stable bias for precision analog stages without trimming. |
| Zero-current shutdown | Sub-1µA VIN current in shutdown enables multi-year battery life in intermittent-use portable devices. |
| Open-loop –VIN inversion | Automatic fallback to unregulated inversion (VOUT ≈ –VIN) when load or input limits prevent regulation-no external logic required. |
| Internal 900kHz oscillator | Eliminates external timing components; allows use of small 1µF ceramic flying capacitor and simplifies BOM. |
| Thermal & short-circuit protection | Hysteretic thermal shutdown (155°C/145°C) prevents damage during sustained overload or PCB-level faults. |
| Low-profile ThinSOT package | 1mm height and 2.8mm × 1.9mm footprint supports space-constrained portable and wearable designs. |
Applications
| Portable Equipment Power | LCD Bias Supply |
|---|---|
Use Scenario: Generating negative supply for OLED display controllers and touch ICs in handheld medical monitors. IC Role / Device Role / Timing Role: Regulated –5V charge-pump inverter providing clean, low-noise bias for display driver ICs requiring dual-rail operation. Use Value: Enables single-cell Li-ion (3.0–4.2V) to power –5V display interfaces without discrete inductors or complex PMIC integration. | Use Scenario: Supplying gate bias voltage for STN/TN LCD panels in industrial HMIs with wide temperature range operation. IC Role / Device Role / Timing Role: Fixed –5V inverting DC/DC converter delivering stable contrast-control voltage independent of main system rail fluctuations. Use Value: Maintains ±4% output accuracy across –40°C to +85°C, ensuring consistent LCD contrast and readability in harsh environments. |
| GaAs FET Bias Supply | Single-Supply Signal Conditioning |
Use Scenario: Providing negative gate voltage for GaAs pHEMT amplifiers in RF front-end modules of IoT sensor gateways. IC Role / Device Role / Timing Role: Low-noise, low-quiescent-current inverter generating –5V bias for depletion-mode GaAs FETs in receive-path LNA stages. Use Value: 25µA quiescent current and 60mVP-P ripple support high dynamic range RF performance while minimizing standby power draw. | Use Scenario: Creating symmetric ±5V rails from a single 5V microcontroller supply for op-amp-based signal conditioning in data acquisition nodes. IC Role / Device Role / Timing Role: Inverting charge pump generating –5V rail to complement existing +5V supply, enabling true bipolar op-amp operation. Use Value: Eliminates need for transformer-based isolated supplies or larger inductor-based inverters-reduces board area and cost in compact sensor nodes. |
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 | Fixed –3V output (vs –5V); identical package, pinout, and quiescent current; same 100mA capability. | Suitable for –3V biasing (e.g., certain op-amps, CMOS logic), not –5V-dependent loads like GaAs FETs or LCD drivers. | Select only if system requires –3V; no PCB change needed but output voltage mismatch invalidates direct substitution for –5V use cases. |
| LTC1754ES6-5#TRPBF | Doubler architecture (not inverter); 50mA max output; 13µA quiescent current; includes shutdown but no open-loop –VIN mode. | Designed for positive voltage doubling (e.g., 3.3V → 5V), not negative rail generation; incompatible topology for VOUT < 0 applications. | Not functionally equivalent: cannot replace LTC1983ES6-5#TRPBF in inverting configurations; consider only for positive-rail boosting where –5V is not required. |
Compared with LTC1983ES6-5#TRPBF, the –3V variant offers identical form-factor and efficiency but fails to meet –5V system requirements, while the LTC1754ES6-5#TRPBF serves a fundamentally different voltage-conversion purpose and lacks inverting capability-neither qualifies as a drop-in replacement.
Availability
LTC1983ES6-5#TRPBF is available at Aetrix Electronics and suitable for portable equipment power, LCD bias supplies, GaAs FET biasing, and single-supply signal conditioning requiring stable component supply and long-term manufacturability.
Supply support for LTC1983ES6-5#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 acquired Linear Technology in 2017 and maintains its precision analog and power management portfolio. Linear pioneered high-performance switched-capacitor DC/DC converters for space- and power-constrained applications.
The LTC1983 series was designed specifically for low-noise, low-quiescent-current negative rail generation in portable and battery-powered systems-emphasizing simplicity (3 external caps), reliability (integrated protection), and minimal footprint (ThinSOT).
FAQ
What is the regulated output voltage of the LTC1983ES6-5#TRPBF?
The LTC1983ES6-5#TRPBF delivers a precisely regulated –5V output with ±4% accuracy over temperature and load when operating in regulated mode (VIN ≥ 5V, IOUT ≤ 100mA). This specification is guaranteed per the Electrical Characteristics table and applies across the full –40°C to +85°C operating range.
Can the LTC1983ES6-5#TRPBF operate without regulation?
Yes. When the condition VIN – 5.06V ≤ IOUT × ROUT is met, the LTC1983ES6-5#TRPBF automatically enters open-loop mode and functions as a low-impedance inverter with VOUT ≈ –VIN. This behavior is inherent to the architecture and requires no external configuration-enabling usable output even under marginal input/load conditions.
What are the minimum external components required for the LTC1983ES6-5#TRPBF?
The LTC1983ES6-5#TRPBF requires only three external capacitors: a 1µF ceramic flying capacitor (CFLY) between C+ and C–, and two ≥4.7µF low-ESR capacitors-one on VIN (CIN) and one on VOUT (COUT). Recommended values are 10µF for CIN and COUT to achieve specified ripple and regulation performance.
Does the LTC1983ES6-5#TRPBF include protection features?
Yes. The LTC1983ES6-5#TRPBF integrates short-circuit protection and over-temperature protection with hysteresis (trip ≈155°C, recovery ≈145°C). During sustained overload, it cycles safely between shutdown and active states without latch-up or damage-ensuring field reliability in unattended or thermally constrained deployments.
What is the shutdown current of the LTC1983ES6-5#TRPBF?
The shutdown current of the LTC1983ES6-5#TRPBF is specified as 0.1µA minimum and 1µA maximum when SHDN = 0V and VIN ≤ 5.5V. This ultra-low leakage enables multi-year battery life in always-on, intermittently active applications such as remote sensors and wearables.
LTC1983ES6-5#TRPBF 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):
- -5V
- 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
LTC1983ES6-5#TRPBF FAQ
1.How can I place an order for LTC1983ES6-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1983ES6-5#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 LTC1983ES6-5#TRPBF reliable?
The price and inventory of LTC1983ES6-5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1983ES6-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1983ES6-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1983ES6-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1983ES6-5#TRPBF?
LTC1983ES6-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1983ES6-5#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 LTC1983ES6-5#TRPBF?
For technical support, including LTC1983ES6-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1983ES6-5#TRPBF requirements.
6.How does Aetrix verify that LTC1983ES6-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1983ES6-5#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 LTC1983ES6-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1983ES6-5#TRPBF?
All LTC1983ES6-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1983ES6-5#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 LTC1983ES6-5#TRPBF part is unused and in its original packaging.
Return procedure for LTC1983ES6-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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