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Analog Devices Inc. LTC1928ES6-5#TRMPBF
- Part No.:
- LTC1928ES6-5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC1928ES6-5#TRMPBF.pdf
- Description:
- IC REG CHRG PUMP 5V 30MA TSOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,664
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Product details
Overview
LTC1928ES6-5#TRMPBF from Analog Devices (formerly Linear Technology) is a fixed 5V, low-noise charge pump + LDO power management IC in a 6-pin ThinSOT package. It accepts 2.7V–4.4V input, delivers up to 30mA regulated output with 90µVRMS noise (10Hz–100kHz), and integrates shutdown control via CN/SHDN pin - designed specifically for powering noise-sensitive VCOs in cellular RF front-ends.
For engineers reviewing the LTC1928ES6-5#TRMPBF datasheet, LTC1928ES6-5#TRMPBF pinout, LTC1928ES6-5#TRMPBF application, or LTC1928ES6-5#TRMPBF equivalent, key selection criteria include output noise floor, CPO output resistance vs. VIN, LDO dropout voltage at 30mA, Burst Mode™ efficiency trade-offs, and thermal shutdown behavior under sustained load.
Technical Context
The LTC1928ES6-5#TRMPBF combines a 550kHz switched-capacitor doubler charge pump with an internal low-dropout linear regulator. The charge pump generates ~2×VIN at CPO, which feeds the LDO stage; regulation is maintained by a trimmed 1.235V bandgap reference and precision oscillator.
It operates in continuous mode for lowest noise or switches to Burst Mode™ below 200µA load to improve efficiency. Internal protection includes thermal shutdown (150°C trip), current limiting, and CPO undervoltage lockout (disable if VCPO < 1.45×VIN).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1% over temperature; no external feedback required. |
| Output Noise | 90µVRMS (10Hz–100kHz); enables clean biasing of RF VCOs without added filtering. |
| Max Output Current | 30mA continuous; limited by CPO output resistance and LDO dropout (100mV @ 10mA). |
| Input Range | 2.7V to 4.4V; compatible with single-cell Li-ion or 3.3V system rails. |
| Shutdown Current | <4µA (typical); VOUT actively discharged via 160Ω switch to ground. |
| Switching Frequency | 480–620kHz; fixed-frequency operation ensures predictable EMI profile. |
| Operating Current | 190µA (typical, no load); supports ultra-low-power portable applications. |
Pinout & Package
Package: 6-lead ThinSOT (TSOT-23), 1mm height, JEDEC MO-193 compliant. Pin pitch: 0.95mm; body dimensions: 2.90 × 1.60 × 1.00 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Main input supply | 2.7V–4.4V source; requires ≥2µF low-ESR ceramic bypass capacitor near pin. |
| GND (Pin 2) | Power and signal reference | Primary thermal path; must connect to large PCB copper area for heat dissipation. |
| VOUT (Pin 3) | Regulated output | 5V low-noise supply; stable with ≥2µF ceramic output capacitor; drives load directly. |
| CPO (Pin 4) | Boosted intermediate node | ~2×VIN unregulated output; supplies LDO; requires ≥2µF low-ESR capacitor for ripple suppression. |
| CP (Pin 5) | Flying capacitor positive terminal | Connects to positive side of 0.47µF flying capacitor; high dv/dt node requiring short trace routing. |
| CN/SHDN (Pin 6) | Flying capacitor negative terminal & enable | Pull ≤0.5V to enter shutdown (<4µA IQ); internal 160Ω discharge switch activates on VOUT. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated doubler + LDO architecture | Eliminates need for inductors while delivering ultra-low-noise 5V output from low-input rails. |
| Burst Mode™ operation | Reduces quiescent current to 190µA at light loads without compromising startup time or regulation. |
| Stable with 2µF ceramic capacitors | Enables compact layout with no tantalum or electrolytic capacitors; reduces BOM cost and footprint. |
| Internal thermal and short-circuit protection | Self-protects during overload or ambient temperature rise; cycles between enable/shutdown above 150°C junction. |
| Active VOUT discharge in shutdown | Ensures rapid, controlled ramp-down of downstream circuitry; prevents floating bias conditions. |
Applications
| Cellular Phone VCO Power | Wireless PCMCIA Card Bias |
|---|---|
|
Use Scenario: Providing clean 5V bias to voltage-controlled oscillators in GSM/UMTS transceivers. IC Role / Device Role / Timing Role: Low-noise regulated supply generator; replaces discrete charge pump + LDO solutions. Use Value: 90µVRMS noise minimizes phase jitter in RF synthesizers, improving EVM and adjacent channel leakage. |
Use Scenario: Powering RF front-end components in laptop wireless expansion cards. IC Role / Device Role / Timing Role: Compact, inductorless 5V booster for noise-sensitive analog sections. Use Value: 30mA output capability and 550kHz switching frequency allow tight EMI filtering without bulky magnetics. |
| Portable Medical Instrument Sensors | Remote Transmitter RF Modules |
|
Use Scenario: Supplying precision analog front-ends in handheld ECG or pulse oximetry devices. IC Role / Device Role / Timing Role: Ultra-low-noise DC-DC converter for ADC reference and op-amp bias rails. Use Value: 2.7V–4.4V input range matches single-cell Li-ion operation; shutdown current <4µA extends battery life. |
Use Scenario: Generating stable 5V for ISM-band transmitter ICs in battery-powered telemetry units. IC Role / Device Role / Timing Role: Regulated boost source enabling consistent transmit power across battery discharge curve. Use Value: Line regulation of 4mV (2.7V–4.4V) and load regulation of 2mV (1–10mA) maintain RF PA performance stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise charge pump + LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1682EMS8-5#PBF | 80mA output, 60µVRMS noise, MSOP-8 package; higher current but larger footprint and no Burst Mode™. | Preferred where >30mA load or lower noise is mandatory; unsuitable for space-constrained ThinSOT layouts. | Select when output current demand exceeds 30mA and board area permits MSOP-8. |
| LTC3200EDD-5#TRMPBF | Constant-frequency doubler only (no integrated LDO); requires external LDO for low-noise output; 5V fixed or adjustable. | Offers flexibility in noise/efficiency trade-off via external LDO choice; adds component count and layout complexity. | Choose when system-level optimization of noise vs. efficiency justifies discrete LDO integration. |
Compared with LTC1928ES6-5#TRMPBF, LTC1682EMS8-5#PBF provides higher output current and lower noise but sacrifices board-area efficiency and dynamic efficiency control; LTC3200EDD-5#TRMPBF decouples charge pump and regulation, enabling custom noise/PSRR tuning but increasing design effort and BOM count.
Availability
LTC1928ES6-5#TRMPBF is available at Aetrix Electronics and suitable for cellular phone RF modules, portable medical sensors, and wireless telemetry systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for LTC1928ES6-5#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 portfolio. Linear pioneered precision power management ICs for demanding signal-chain applications.
The LTC1928ES6-5#TRMPBF belongs to Linear's low-noise power conversion family, engineered specifically for RF and precision analog biasing where inductor-free, ultra-low-noise DC-DC conversion is critical.
FAQ
What is the maximum continuous output current of the LTC1928ES6-5#TRMPBF?
The LTC1928ES6-5#TRMPBF delivers up to 30mA continuously under typical conditions (VIN = 3V, TA = 25°C). This limit arises from the combination of CPO output resistance (~30Ω at VIN = 2.7V), LDO dropout voltage (100mV at 10mA), and thermal constraints. At higher loads or elevated ambient temperatures, current capability decreases due to thermal foldback.
Does the LTC1928ES6-5#TRMPBF require external compensation components?
No, the LTC1928ES6-5#TRMPBF is internally compensated and stable with only a 2µF ceramic capacitor on VOUT. Its LDO stage does not require external resistors or capacitors for loop stability - simplifying layout and reducing BOM count compared to adjustable regulators.
How does Burst Mode™ operation affect output noise in the LTC1928ES6-5#TRMPBF?
In Burst Mode™ (activated below ~200µA load), the LTC1928ES6-5#TRMPBF disables the 550kHz oscillator between charge pulses, reducing quiescent current to 190µA but increasing output noise to ~800µVP-P (10Hz–2.5MHz). For noise-critical VCO biasing, continuous mode is recommended.
Can the LTC1928ES6-5#TRMPBF be used with input voltages below 2.7V?
No - the LTC1928ES6-5#TRMPBF is specified and guaranteed only for VIN = 2.7V to 4.4V. Operation below 2.7V may result in failure to start, unstable regulation, or violation of absolute maximum ratings (e.g., CPO undervoltage lockout at 1.45×VIN). It is not rated for 1.8V or 2.5V rail operation.
What is the purpose of the CPO pin on the LTC1928ES6-5#TRMPBF, and can it drive an external load?
The CPO pin on the LTC1928ES6-5#TRMPBF provides the boosted ~2×VIN voltage that powers the internal LDO. While it can drive small external loads (e.g., auxiliary LDOs), doing so reduces available current at VOUT proportionally - e.g., a 1mA external CPO load reduces VOUT current capability by 1mA. CPO requires ≥2µF low-ESR capacitance for stability.
LTC1928ES6-5#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-Up
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 4.4V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 30mA
- Frequency - Switching:
- 550kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LTC1928ES6-5#TRMPBF FAQ
1.How can I place an order for LTC1928ES6-5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1928ES6-5#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 LTC1928ES6-5#TRMPBF reliable?
The price and inventory of LTC1928ES6-5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1928ES6-5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC1928ES6-5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1928ES6-5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1928ES6-5#TRMPBF?
LTC1928ES6-5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1928ES6-5#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 LTC1928ES6-5#TRMPBF?
For technical support, including LTC1928ES6-5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1928ES6-5#TRMPBF requirements.
6.How does Aetrix verify that LTC1928ES6-5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC1928ES6-5#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 LTC1928ES6-5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC1928ES6-5#TRMPBF?
All LTC1928ES6-5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1928ES6-5#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 LTC1928ES6-5#TRMPBF part is unused and in its original packaging.
Return procedure for LTC1928ES6-5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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