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Analog Devices Inc. LT1610IS8#TRPBF
- Part No.:
- LT1610IS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1610IS8#TRPBF.pdf
- Description:
- IC REG BST SEPIC ADJ 450MA 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,684
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Product details
Overview
LT1610IS8#TRPBF from Analog Devices (formerly Linear Technology) is a micropower, fixed-frequency 1.7MHz step-up DC/DC converter optimized for single-cell battery systems. It operates with input as low as 1V, delivers up to 28V output, supports 300mA switch current with 300mV VCE(SAT), and features internal compensation and Burst Mode™ operation for ultra-low quiescent current (30µA). It is used in portable electronics requiring compact, high-efficiency boost conversion from weak or aging batteries.
For engineers reviewing the LT1610IS8#TRPBF datasheet, LT1610IS8#TRPBF pinout, LT1610IS8#TRPBF application, or LT1610IS8#TRPBF equivalent, key selection criteria include minimum input voltage (1V), feedback reference (1.23V), shutdown current (<1µA), switching frequency (1.7MHz), and compatibility with tiny external components (4.7µH inductor, 22µF tantalum caps).
Technical Context
The LT1610IS8#TRPBF employs current-mode PWM control with a 1.7MHz oscillator and integrated ramp generator to prevent subharmonic oscillation above 50% duty cycle. Its error amplifier drives the VC pin, which directly controls peak switch current via comparator A2 and flip-flop logic.
Burst Mode™ operation enables micropower regulation at light loads: when FB rises above 1.23V, the hysteretic comparator disables all circuitry except the error amplifier and bias network, reducing quiescent current to 30µA while maintaining output regulation through low-frequency switching bursts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.7MHz typical - enables use of miniature 4.7µH inductors and 22µF tantalum capacitors, minimizing board area. |
| Min Input Voltage | 1.0V - supports regulation from deeply discharged alkaline or NiMH single cells (e.g., 0.9V–1.5V range). |
| Feedback Reference | 1.23V ±30mV - sets output via resistive divider (VOUT = 1.23V × (1 + R1/R2)), enabling precise 3V, 3.3V, 5V, or 28V outputs. |
| Quiescent Current | 30µA - ensures >1-year battery life in always-on low-power devices like pagers or sensor nodes. |
| Switch VCE(SAT) | 300mV at 300mA - minimizes conduction loss in boost switch, critical for efficiency below 1.5V input. |
| Shutdown Current | <1µA - allows true zero-power standby in battery-backed systems such as memory retention circuits. |
| Max Duty Cycle | 95% - supports high step-up ratios (e.g., 1V→28V) without saturation, essential for LCD bias generation. |
Pinout & Package
LT1610IS8#TRPBF is housed in an 8-lead SO package (SO-8, narrow 0.150"), with thermal pad not present. Pin pitch is 1.27mm, body width 3.9mm, and maximum height 1.75mm - compatible with standard SO-8 reflow profiles and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC (Pin 1) | Error amplifier output | Drives internal switch current limit; connects to external RC compensation or COMP pin for stability tuning. |
| FB (Pin 2) | Feedback input | Monitors output via resistor divider; 1.23V reference enables accurate output voltage setting and line/load regulation. |
| SHDN (Pin 3) | Enable/disable control | Logic-low (≤0.3V) disables IC; logic-high (≥1V) enables operation - supports system-level power sequencing. |
| PGND (Pin 4) | Power ground return | Carries high-frequency switch current; must be tied directly to local ground plane to minimize EMI and voltage spikes. |
| SW (Pin 5) | Switch node | Connects to inductor/diode junction; high di/dt requires short, wide trace to reduce radiated noise and ringing. |
| VIN (Pin 6) | Input supply | Accepts 0.9V–8V; requires local 22µF tantalum bypass capacitor placed adjacent to pin to suppress input ripple. |
| GND (Pin 7) | Signal ground | Reference for error amp and bias circuits; separate from PGND to avoid noise coupling into feedback path. |
| COMP (Pin 8) | Internal compensation node | Tied to VC for simplified design (50kΩ/50pF internal RC); left floating if external RC compensation is used. |
Key Features
| Feature | Design Value |
|---|---|
| 1.7MHz fixed-frequency operation | Enables use of <5mm² total passive area (4.7µH inductor + two 22µF tantalums), ideal for space-constrained wearables. |
| Internally compensated architecture | Eliminates need for external compensation components - reduces BOM count and layout complexity in cost-sensitive designs. |
| Burst Mode™ at light load | Maintains >70% efficiency down to 1mA load while drawing only 30µA quiescent current - extends battery runtime significantly. |
| Low 300mV VCE(SAT) at 300mA | Reduces switch conduction loss by ~50% vs. comparable 600mV devices, improving efficiency especially at 1.0V–1.2V input. |
| 1V minimum operating voltage | Supports full regulation from exhausted AA/AAA cells (down to 0.9V), eliminating premature device shutdown in battery-powered equipment. |
Applications
| Pagers & Cordless Phones | LCD Bias Generation |
|---|---|
|
Use Scenario: Powering RF front-end and baseband ICs in legacy paging receivers operating from one or two alkaline cells. IC Role / Device Role / Timing Role: Step-up converter generating stable 3V or 5V rail from decaying 1.0–1.5V cell voltage during battery discharge. Use Value: Enables continuous operation until cell voltage drops below 0.9V, extending usable battery life by >25% versus higher-VIN(min) alternatives. |
Use Scenario: Generating AVDD (+8V), VON (+24V), and VOFF (–8V) rails for TFT-LCD modules in handheld medical displays. IC Role / Device Role / Timing Role: Primary boost controller in multi-output bias supply using charge-pump and inverting stages. Use Value: Delivers 70mA at 8V and 5mA at ±8V/24V with all-ceramic capacitors, achieving <50mVP-P ripple and eliminating electrolytic bulk caps. |
| Single-Cell Super Capacitor Charger | Portable Electronic Equipment |
|
Use Scenario: Charging 0.1–1F supercapacitors from a single AA alkaline cell for energy-harvesting backup power in IoT sensors. IC Role / Device Role / Timing Role: Constant-current/constant-voltage charger with programmable 4.5V output and automatic shutdown at full charge. Use Value: Achieves 92% peak efficiency at 10mA charge current and draws only 30µA quiescent current between charging cycles. |
Use Scenario: Powering microcontroller, display, and wireless transceiver in compact Bluetooth earbuds powered by a single Li-ion cell. IC Role / Device Role / Timing Role: Main 3.3V system rail generator supporting dynamic load steps from 10µA (sleep) to 200mA (transmit). Use Value: Burst Mode™ maintains >80% efficiency across 10µA–200mA load range, enabling >10-hour playback on 120mAh cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1307CS8#TRPBF | 600kHz switching frequency; higher 100µA quiescent current; no Burst Mode™; max 75mA output at 3.3V from 1 cell. | Less suitable for ultra-low-power applications; requires larger inductors/caps; lower efficiency below 5mA load. | Select when cost is primary concern and 600kHz EMI profile is preferred over 1.7MHz. |
| LT1613ES5#TRPBF | SOT-23-5 package; 1.4MHz frequency; 3.3V→5V optimized; 200mA output; 25µA quiescent current; no internal compensation. | Designed for fixed 3.3V-to-5V boost only; lacks adjustable feedback and wide-VOUT capability (max 5.5V). | Select for space-constrained 3.3V-to-5V point-of-load conversion where footprint is critical and output voltage is fixed. |
Compared with LT1307CS8#TRPBF and LT1613ES5#TRPBF, the LT1610IS8#TRPBF offers broader input range (1V–8V), higher output voltage capability (up to 28V), and superior light-load efficiency via Burst Mode™ - making it uniquely suited for single-cell battery systems requiring flexible, high-ratio boost conversion.
Availability
LT1610IS8#TRPBF is available at Aetrix Electronics and suitable for portable medical devices, battery-powered instrumentation, LCD bias supplies, and energy-harvesting systems requiring stable component supply with guaranteed long-term availability.
Supply support for LT1610IS8#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 full technical support, manufacturing, and qualification for all Linear-branded power products including the LT1610 series.
The LT1610 belongs to Linear's micropower DC/DC converter product line, designed specifically for battery-operated portable electronics where ultra-low quiescent current, small solution size, and reliable operation from weak input sources are critical.
FAQ
What is the minimum input voltage required for LT1610IS8#TRPBF to regulate output?
The LT1610IS8#TRPBF guarantees regulation down to 1.0V at 25°C and 1.25V at –40°C. It can start switching as low as 0.9V but may not maintain tight output regulation below 1.0V under load. This makes LT1610IS8#TRPBF suitable for applications powered by single alkaline, NiMH, or Li-ion cells nearing end-of-life.
Does LT1610IS8#TRPBF support external compensation, and why would I use it?
Yes, LT1610IS8#TRPBF supports both internal (via COMP pin tied to VC) and external (RC network from VC to GND) compensation. External compensation (e.g., 220kΩ + 220pF) is recommended when using ceramic output capacitors to ensure phase margin >45° across temperature and load - critical for stable transient response in high-efficiency designs.
Can LT1610IS8#TRPBF generate negative output voltages?
No, LT1610IS8#TRPBF is a boost-only topology controller. However, it can be used in SEPIC configurations (with coupled or uncoupled inductors) to generate regulated outputs both above and below input voltage - including positive rails like 3.3V from 3.6V Li-ion, or 5V from 4.2V. For true inverting outputs, LT1611 is the designated Linear alternative.
What is the purpose of the PGND and GND pins being separate on LT1610IS8#TRPBF?
PGND carries high-frequency switch current (up to 300mA pulsed), while GND serves as the quiet reference for the error amplifier and bias circuits. Separating them prevents di/dt-induced noise from modulating the feedback loop - a key layout requirement to avoid oscillation and ensure stable regulation, especially at light loads.
How does Burst Mode™ operation affect efficiency and output ripple in LT1610IS8#TRPBF?
Burst Mode™ reduces average input current to 30µA at light loads by disabling most internal circuitry between switching bursts, raising efficiency to >75% at 1mA. However, it introduces low-frequency (1–10kHz) output ripple (typically 20–50mVP-P) due to intermittent switching - acceptable for bias rails but may require post-regulation for sensitive analog circuits.
LT1610IS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Boost, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.9V
- Voltage - Input (Max):
- 8V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 30V (Switch)
- Current - Output:
- 450mA (Switch)
- Frequency - Switching:
- 1.7MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1610IS8#TRPBF FAQ
1.How can I place an order for LT1610IS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1610IS8#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 LT1610IS8#TRPBF reliable?
The price and inventory of LT1610IS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1610IS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1610IS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1610IS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1610IS8#TRPBF?
LT1610IS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1610IS8#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 LT1610IS8#TRPBF?
For technical support, including LT1610IS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1610IS8#TRPBF requirements.
6.How does Aetrix verify that LT1610IS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1610IS8#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 LT1610IS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1610IS8#TRPBF?
All LT1610IS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1610IS8#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 LT1610IS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1610IS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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