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Analog Devices Inc. LTC1928ES6-5#TRPBF
- Part No.:
- LTC1928ES6-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC1928ES6-5#TRPBF.pdf
- Description:
- IC REG CHRG PUMP 5V 30MA TSOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,339
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Product details
Overview
LTC1928ES6-5#TRPBF from Analog Devices (formerly Linear Technology) is a fixed 5V, low-noise charge pump voltage doubler with integrated low-dropout linear regulator in a 6-pin ThinSOT package. It accepts 2.7V–4.4V input, delivers up to 30mA output current, achieves 90µVRMS noise (10Hz–100kHz), and operates at 550kHz switching frequency-designed specifically for powering noise-sensitive VCOs in cellular RF front-ends.
For engineers reviewing the LTC1928ES6-5#TRPBF datasheet, LTC1928ES6-5#TRPBF pinout, LTC1928ES6-5#TRPBF application, or LTC1928ES6-5#TRPBF equivalent, key selection criteria include its guaranteed 5V ±1% output over temperature, 100mV dropout voltage at 10mA, shutdown current <4µA, stability with only 2µF ceramic output capacitance, and thermal/short-circuit protection-critical for portable wireless power rail design.
Technical Context
The LTC1928ES6-5#TRPBF integrates a switched-capacitor voltage doubler and an LDO regulator in a single die. The charge pump generates ~2×VIN at CPO, which feeds the LDO stage; regulation is achieved via a trimmed 1.235V internal bandgap reference and precision oscillator.
It employs Burst Mode™ operation below 200µA load to reduce quiescent current to 190µA while maintaining regulation, and features active CPO voltage monitoring (enable threshold at 1.75×VIN, disable at 1.45×VIN) to prevent LDO dropout-induced noise coupling into VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1% (4.9V–5.1V) over –40°C to 85°C - ensures stable bias for VCOs without external feedback. |
| Output Noise | 90µVRMS (10Hz–100kHz); 800µVP-P (10Hz–2.5MHz) - meets stringent phase noise requirements in RF synthesizers. |
| Input Range | 2.7V to 4.4V - compatible with single-cell Li-ion (3.0V–4.2V) and regulated 3.3V rails. |
| Max Output Current | 30mA continuous - sufficient for dual-band VCOs, GaAs switches, or low-power ADC/DAC analog supplies. |
| Quiescent Current | 190µA typical (Burst Mode™ active) - enables always-on low-noise biasing in battery-powered systems. |
| Shutdown Current | <4µA - preserves battery life during RF sleep modes without external discharge circuitry. |
| Switching Frequency | 550kHz (480–620kHz range) - high enough to allow small 0.47µF flying capacitor and avoid AM radio band interference. |
Pinout & Package
Package: 6-lead ThinSOT (S6), 1mm height, JEDEC MO-193 compliant - optimized for space-constrained portable PCBs with minimal thermal resistance via GND pad exposure.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Main power input | Accepts 2.7V–4.4V; requires ≥2µF low-ESR ceramic bypass close to pin for ripple suppression and transient response. |
| GND (Pin 2) | System ground reference | Primary thermal path; must connect to large copper pour for junction temperature control under 30mA load. |
| VOUT (Pin 3) | Regulated 5V output | Low-noise LDO output; stable with ≥2µF ceramic capacitor; directly powers noise-sensitive analog circuits. |
| CPO (Pin 4) | Boosted unregulated node | ~2×VIN (e.g., ~6V at VIN=3V); requires ≥2µF low-ESR capacitor to minimize droop and spike noise feeding LDO. |
| CP (Pin 5) | Flying capacitor positive terminal | Connects to 0.47µF ceramic flying capacitor; high dv/dt node - keep trace short and away from sensitive analog routing. |
| CN/SHDN (Pin 6) | Flying capacitor negative / shutdown control | Pull to GND via ≤1kΩ resistor to enter shutdown (<4µA IQ); internal 160Ω discharge switch pulls VOUT to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated doubler + LDO | Eliminates need for external inductors and separate regulator IC - reduces BOM count and layout area in RF modules. |
| Stable with 2µF ceramic output cap | Enables use of compact, low-ESR X5R/X7R MLCCs instead of larger tantalum or electrolytic capacitors. |
| Burst Mode™ efficiency optimization | Maintains 190µA IQ at light loads while preserving 5V regulation - extends battery runtime in intermittent-use devices. |
| Thermal & short-circuit protection | Auto-shutdown at >150°C junction temp and current limiting on VOUT - ensures robustness in unattended portable applications. |
| Low-profile ThinSOT package | 1mm max height and 2.9mm × 1.6mm footprint - fits beneath compact antennas or within tight shield can constraints. |
Applications
| Cellular Phone VCO Supply | Wireless PCMCIA Card Bias |
|---|---|
|
Use Scenario: Providing clean 5V bias to voltage-controlled oscillators in GSM/UMTS transceivers where phase noise directly impacts EVM and adjacent channel leakage. IC Role / Device Role / Timing Role: Low-noise regulated power source replacing noisy switching converters or inefficient resistive drops. Use Value: 90µVRMS noise ensures VCO phase jitter remains below 1° RMS, meeting 3GPP spectral mask requirements. |
Use Scenario: Powering RF front-end components (e.g., power amplifiers, switches) in laptop PCMCIA wireless LAN cards operating from 3.3V system rails. IC Role / Device Role / Timing Role: Compact, inductorless 5V generation enabling thin card form factors without compromising RF performance. Use Value: 550kHz switching frequency avoids interference with 2.4GHz ISM band; 30mA output supports multi-stage PA biasing. |
| Portable Medical Instrument Sensor Bias | Remote Transmitter RF Section |
|
Use Scenario: Delivering ultra-low-noise supply to precision analog front-ends (e.g., EEG/ECG amplifiers) in handheld diagnostic devices powered by coin cells or Li-ion. IC Role / Device Role / Timing Role: High PSRR LDO stage filtering charge pump ripple to preserve signal integrity in µV-level biopotential measurements. Use Value: 100mV dropout allows operation down to 3.0V input - extends usable battery range while maintaining 5.0V sensor bias accuracy. |
Use Scenario: Generating stable 5V for narrowband RF transmitters (e.g., sub-GHz ISM telemetry) deployed in battery-operated remote sensors with multi-year lifetime targets. IC Role / Device Role / Timing Role: Efficient, always-on bias generator with <4µA shutdown current enabling deep-sleep wake-up cycles. Use Value: 190µA operating current at light load minimizes average power draw; thermal protection prevents field failure in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise charge pump regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1682EMS8-5#PBF | 8-pin MSOP package; 60µVRMS noise; 80mA output; higher 2.5V–5.5V input range | Supports higher current and wider input - suitable for multi-VCO or dual-path RF systems | Choose LTC1682 when >30mA load or lower noise floor is required; board redesign needed due to different package and pinout. |
| LTC3200EDD-5#TRMPBF | Constant-frequency 550kHz doubler (no LDO); 5V output; 100mA; requires external LDO for low noise | Higher output current but no integrated regulation - needs additional LDO and filtering for VCO-grade noise performance | Choose LTC3200 only if system already includes a low-noise LDO; adds complexity but improves efficiency at >50mA loads. |
Compared with LTC1928ES6-5#TRPBF, LTC1682 offers lower noise and higher current in a larger package, while LTC3200 provides higher current but requires external regulation to match LTC1928ES6-5#TRPBF's integrated noise performance - making LTC1928ES6-5#TRPBF optimal for space- and noise-constrained 30mA applications.
Availability
LTC1928ES6-5#TRPBF is available at Aetrix Electronics and suitable for cellular phone RF modules, wireless PCMCIA cards, portable medical instruments, remote transmitters, and white LED driver biasing requiring stable component supply across industrial temperature ranges.
Supply support for LTC1928ES6-5#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 legacy precision analog portfolio. Linear was founded to deliver high-performance, application-optimized ICs for demanding signal conditioning and power management tasks.
The LTC1928ES6-5#TRPBF belongs to Linear's low-noise power management family, designed specifically for RF and precision analog applications where switching noise, dropout voltage, and thermal behavior directly impact system-level RF performance and battery life.
FAQ
What is the minimum input voltage required for stable 5V output from the LTC1928ES6-5#TRPBF?
The LTC1928ES6-5#TRPBF requires a minimum input voltage of 2.7V to maintain regulated 5V output across temperature and load. Below this, the internal charge pump cannot generate sufficient CPO voltage (>1.75×VIN) to enable the LDO stage, resulting in loss of regulation. At VIN = 2.7V, the device delivers full 30mA with 100mV dropout - ensuring reliable operation across the full specified input range.
Can the LTC1928ES6-5#TRPBF drive a 50mA load?
No - the LTC1928ES6-5#TRPBF is rated for a maximum continuous output current of 30mA. Attempting to draw 50mA will cause the LDO to enter dropout, increasing output noise and potentially triggering thermal shutdown. For higher current needs, consider the LTC1682EMS8-5#PBF (80mA) or pair the LTC1928ES6-5#TRPBF with an external low-noise LDO buffer stage.
Does the LTC1928ES6-5#TRPBF require external compensation components?
No - the LTC1928ES6-5#TRPBF is internally compensated and stable with only a 2µF ceramic capacitor on VOUT. No external resistors, capacitors, or feedback networks are needed. This simplifies design and eliminates tuning effort, unlike many adjustable LDOs or discrete charge pump + regulator combinations.
How does the CN/SHDN pin function on the LTC1928ES6-5#TRPBF?
The CN/SHDN pin (Pin 6) serves dual functions: it is the negative terminal for the flying capacitor (CN) and the active-low shutdown control (SHDN). Pulling it to GND via ≤1kΩ resistor disables the charge pump, reduces supply current to <4µA, and activates a 160Ω internal switch that discharges VOUT to ground. During normal operation, it must be left floating or AC-coupled to GND through the flying capacitor.
Is the LTC1928ES6-5#TRPBF RoHS-compliant and lead-free?
Yes - the LTC1928ES6-5#TRPBF carries the #TRPBF suffix, indicating tape-and-reel packaging with 100% matte tin (Sn) lead finish, fully compliant with RoHS Directive 2011/65/EU and JEDEC J-STD-609. The part marking "LTKT" and S6 package meet Linear Technology's lead-free manufacturing standards.
LTC1928ES6-5#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-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#TRPBF FAQ
1.How can I place an order for LTC1928ES6-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1928ES6-5#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 LTC1928ES6-5#TRPBF reliable?
The price and inventory of LTC1928ES6-5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1928ES6-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1928ES6-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1928ES6-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1928ES6-5#TRPBF?
LTC1928ES6-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1928ES6-5#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 LTC1928ES6-5#TRPBF?
For technical support, including LTC1928ES6-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1928ES6-5#TRPBF requirements.
6.How does Aetrix verify that LTC1928ES6-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1928ES6-5#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 LTC1928ES6-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1928ES6-5#TRPBF?
All LTC1928ES6-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1928ES6-5#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 LTC1928ES6-5#TRPBF part is unused and in its original packaging.
Return procedure for LTC1928ES6-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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