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Analog Devices Inc. LT1610CS8#TRPBF
- Part No.:
- LT1610CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1610CS8#TRPBF.pdf
- Description:
- IC REG BST SEPIC ADJ 450MA 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,167
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Product details
Overview
LT1610CS8#TRPBF from Analog Devices (formerly Linear Technology) is a micropower, fixed-frequency 1.7MHz step-up DC/DC converter optimized for single-cell battery operation. It delivers 3V at 30mA from 1V input, supports up to 28V output, features internal compensation, and uses an integrated NPN switch with 300mV VCE(SAT) at 300mA - ideal for low-power portable electronics requiring compact, high-efficiency boost conversion.
For engineers reviewing the LT1610CS8#TRPBF datasheet, LT1610CS8#TRPBF pinout, LT1610CS8#TRPBF application, or LT1610CS8#TRPBF equivalent, key selection criteria include minimum input voltage (1V), quiescent current (30µA), feedback reference (1.23V), Burst Mode™ operation for light-load efficiency, and compatibility with tiny external inductors (e.g., 4.7µH) and ceramic/tantalum capacitors.
Technical Context
The LT1610CS8#TRPBF employs current-mode PWM control with a 1.7MHz oscillator and automatic Burst Mode™ switching below ~1mA load to maintain high efficiency across wide load ranges. Its internal NPN power switch and error amplifier with transconductance of 25µmhos enable precise regulation via the FB pin (1.23V reference) and VC pin for loop compensation.
It operates in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM), supports SEPIC and boost topologies, and integrates a hysteretic shutdown comparator enabling <1µA shutdown current. The device's 77–95% maximum duty cycle and 450–900mA switch current limit are temperature- and duty-cycle-dependent per design correlation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.7MHz typical - enables use of sub-10µH inductors and small ceramic/tantalum capacitors for space-constrained designs. |
| Minimum Input Voltage | 1.0V - supports direct operation from single alkaline, NiMH, or Li-ion cells down to end-of-life voltage. |
| Feedback Reference Voltage | 1.23V ±30mV - sets regulated output via external resistor divider; enables stable 3.3V, 5V, or higher outputs with tight tolerance. |
| Quiescent Current | 30µA - ensures >1-year battery life in always-on sensor nodes or backup systems with microamp standby loads. |
| Switch VCE(SAT) | 300mV at 300mA - minimizes conduction loss and thermal rise in high-current boost stages (e.g., 5V@200mA from 3.3V). |
| Burst Mode™ Threshold | ~1mA load - automatically transitions to low-frequency pulsed operation to sustain >80% efficiency at ultra-light loads. |
| Shutdown Current | <1µA - eliminates battery drain during system sleep or storage modes without external disconnect circuitry. |
Pinout & Package
LT1610CS8#TRPBF is housed in an 8-lead SO (Small Outline) plastic package (S8), 0.150" wide, with standard JEDEC MS-012AC footprint. Pin 1 is VC (error amplifier output), Pin 2 is FB (feedback), Pin 3 is SHDN (active-high shutdown), Pin 4 is PGND (power ground), Pin 5 is SW (switch node), Pin 6 is VIN (input supply), Pin 7 is GND (signal ground), and Pin 8 is COMP (internal compensation network).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC (Pin 1) | Error amplifier output | Connects to external RC compensation network or internal COMP pin; sets loop stability and transient response. |
| FB (Pin 2) | Feedback input | Monitors output via resistive divider; 1.23V reference enables precise output voltage setting (e.g., 3.3V = 1.23V × (1 + R1/R2)). |
| SHDN (Pin 3) | Enable control | Logic-high ≥1V enables operation; grounded disables converter and reduces supply current to <1µA. |
| 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; handles high di/dt; requires short, low-inductance PCB trace to reduce ringing. |
| VIN (Pin 6) | Input supply | Accepts 1.0V–8.0V; requires local 10µF tantalum or ceramic bypass capacitor placed adjacent to pin. |
| GND (Pin 7) | Signal ground | Reference for internal circuitry; separate from PGND to avoid noise coupling into error amplifier and reference. |
| COMP (Pin 8) | Internal compensation | Tie to VC for simplified design; enables internal 50kΩ/50pF network - eliminates external RC but limits optimization flexibility. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 30µA quiescent current enables multi-year battery life in remote sensors and wearables powered by coin cells or single AA. |
| Single-cell start-up | Operates from 1.0V input - supports full functionality down to depleted alkaline/NiMH cell voltage without brownout reset. |
| Internally compensated option | COMP-to-VC connection eliminates two external components, reducing BOM count and board area in cost-sensitive applications. |
| High output voltage capability | Regulates up to 28V - suitable for LCD bias supplies (e.g., AVDD=8V, VON=24V, VOFF=–8V) using all-ceramic capacitor designs. |
| Burst Mode™ efficiency | Maintains >75% efficiency at 1mA load - critical for intermittent-data IoT devices where average current dominates battery lifetime. |
| Low VCE(SAT) switch | 300mV drop at 300mA - improves thermal performance and enables 5V@200mA output from 3.3V input with minimal heatsinking. |
Applications
| Pagers & Cordless Phones | Battery Backup Systems |
|---|---|
Use Scenario: Powering RF front-end and display circuits in legacy pagers and DECT cordless handsets operating from single 1.5V alkaline cells. IC Role / Device Role / Timing Role: Step-up converter generating stable 3V or 5V rail from decaying 1.0–1.5V input; provides regulated supply independent of battery state-of-charge. Use Value: Extends usable battery life by 30% compared to linear regulators, while maintaining RF signal integrity via low-noise Burst Mode™ operation. | Use Scenario: Maintaining SRAM or real-time clock (RTC) voltage during main power failure in industrial controllers and medical devices. IC Role / Device Role / Timing Role: Low-quiescent-current boost converter charging supercapacitors or backing up 3.3V logic rails from 1.2V NiMH or LiFePO₄ backup cells. Use Value: Enables >72-hour hold-up time with 0.1F supercap using only 30µA standby draw - no external MOSFET or diode required. |
| LCD Bias Generation | Portable Electronic Equipment |
Use Scenario: Generating dual-rail (±8V, +24V) and positive (8V) bias voltages for TFT-LCD panels in handheld test instruments and portable displays. IC Role / Device Role / Timing Role: Primary DC/DC controller in multi-output SEPIC or charge-pump-assisted boost topology; regulates three independent outputs from 3.3V input. Use Value: Achieves <50mVP-P ripple on AVDD using 1µF X7R ceramic + 4.7µF bulk capacitor - meets stringent LCD contrast and flicker requirements. | Use Scenario: Power management in Bluetooth headsets, glucose meters, and digital thermometers powered by single AAA or button cells. IC Role / Device Role / Timing Role: Main system supply IC converting 1.2V–1.5V battery voltage to regulated 3.3V for MCU, BLE radio, and analog front-end. Use Value: Delivers 30mA @ 3.3V with 85% peak efficiency and <1µA shutdown - enables 6-month operation on CR2032 without recharge circuitry. |
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 |
|---|---|---|---|
| LTC1307ES6#TRMPBF | 600kHz switching frequency; SOT-23-6 package; 3.3V@75mA from 1-cell; 10µA IQ | Lower frequency allows larger inductors but limits miniaturization; lower max output voltage (≤15V) | Preferred for ultra-low-IQ designs where board space is less constrained than efficiency at light loads. |
| LT1613CS6#TRMPBF | 1.4MHz; SOT-23-6; 3.3V→5V@200mA; 100µA IQ; no Burst Mode™ | Higher IQ and no light-load efficiency mode; optimized for fixed-input, fixed-output boost rather than wide-VIN micropower use | Chosen when driving constant 200mA loads from 3.3V with minimal external components, not for battery longevity. |
Compared with LTC1307ES6#TRMPBF and LT1613CS6#TRMPBF, the LT1610CS8#TRPBF uniquely balances 1.7MHz speed, 1V start-up, 30µA IQ, and Burst Mode™ - making it optimal for space-limited, single-cell applications demanding both high light-load efficiency and high output voltage capability.
Availability
LT1610CS8#TRPBF is available at Aetrix Electronics and suitable for portable medical devices, battery-powered instrumentation, and LCD bias supplies requiring stable component supply, long-term lifecycle support, and guaranteed commercial-grade (0°C to 70°C) performance.
Supply support for LT1610CS8#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 and manufacturing continuity for the LT product line. Linear Technology pioneered high-performance analog ICs with emphasis on power management, precision signal conditioning, and robust reliability.
The LT1610CS8#TRPBF belongs to Linear's micropower DC/DC converter family, designed specifically for energy-constrained portable systems requiring high efficiency across ultra-wide load ranges - from nanoamp sleep currents to hundreds of milliamps of active load.
FAQ
What is the minimum input voltage required for LT1610CS8#TRPBF to start switching?
The LT1610CS8#TRPBF starts switching at a minimum input voltage of 1.0V under typical conditions (25°C, commercial grade). At –40°C, the minimum operating voltage rises to 1.25V due to semiconductor characteristics. This 1V start-up enables direct operation from nearly depleted single-cell batteries, supporting extended runtime in portable equipment without external pre-bias circuits.
Can LT1610CS8#TRPBF be used in SEPIC topology, and what are the key layout considerations?
Yes, the LT1610CS8#TRPBF supports SEPIC topology, as confirmed in its datasheet Figure 4 and Application Note 19. Key layout requirements include separating PGND and GND planes, placing C2's negative terminal adjacent to Pin 4 (PGND), using multiple vias to tie PGND copper to the main ground plane at a single point, and minimizing trace area at SW and FB pins to suppress EMI and ensure stable regulation across input voltage ranges spanning above and below the output.
Does LT1610CS8#TRPBF require external compensation components, or can it operate with internal compensation?
The LT1610CS8#TRPBF supports both configurations: tying Pin 8 (COMP) to Pin 1 (VC) enables internal 50kΩ/50pF compensation, eliminating external RC parts and simplifying design. For optimized transient response - especially with ceramic output capacitors - an external 220kΩ/220pF RC network from VC to ground is recommended. The internal option is valid for most tantalum-capacitor-based designs per Figure 12 in the datasheet.
What is the maximum output voltage achievable with LT1610CS8#TRPBF, and what limits this value?
The LT1610CS8#TRPBF supports output voltages up to 28V, as specified in its Absolute Maximum Ratings and validated in typical applications (e.g., TFT LCD bias at 24V). This limit is constrained by the 30V absolute maximum rating on the SW pin and practical considerations including diode reverse voltage rating, capacitor voltage derating, and PCB creepage/clearance. Exceeding 28V risks violating SO-8 package isolation and degrading long-term reliability.
How does Burst Mode™ operation improve efficiency at light loads in LT1610CS8#TRPBF?
Burst Mode™ in the LT1610CS8#TRPBF reduces average input current at light loads (<1mA) by disabling the oscillator, driver, and power stage between regulation pulses - leaving only the error amplifier and reference active (drawing 30µA). This pulsed operation maintains output regulation while cutting dynamic losses, achieving >75% efficiency at 1mA versus <40% in forced continuous mode, directly extending battery life in intermittently active devices.
LT1610CS8#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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1610CS8#TRPBF FAQ
1.How can I place an order for LT1610CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1610CS8#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 LT1610CS8#TRPBF reliable?
The price and inventory of LT1610CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1610CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1610CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1610CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1610CS8#TRPBF?
LT1610CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1610CS8#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 LT1610CS8#TRPBF?
For technical support, including LT1610CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1610CS8#TRPBF requirements.
6.How does Aetrix verify that LT1610CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1610CS8#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 LT1610CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1610CS8#TRPBF?
All LT1610CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1610CS8#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 LT1610CS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1610CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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