My Inquiry
My Account
Analog Devices Inc. LT1110CS8-12#PBF
- Part No.:
- LT1110CS8-12#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1110CS8-12#PBF.pdf
- Description:
- IC REG BUCK BOOST 12V 1.5A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,772
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1110CS8-12#PBF from Analog Devices is a micropower DC-DC converter in 8-lead SOIC package, delivering fixed 12V output with 11.4–12.6V regulation tolerance, 1.0V minimum input voltage, and 300µA quiescent current. It operates in step-up or step-down mode, integrates a 1A internal power switch, and includes on-chip auxiliary gain block for low-battery detection in single-cell battery-powered systems.
For engineers reviewing the LT1110CS8-12#PBF datasheet, LT1110CS8-12#PBF pinout, LT1110CS8-12#PBF application, or LT1110CS8-12#PBF equivalent, key selection criteria include minimum 1.0V start-up capability, user-adjustable switch current limit via ILIM pin, reverse battery protection up to –1.6V, and compatibility with surface-mount inductors and capacitors in space-constrained portable designs.
Technical Context
The LT1110CS8-12#PBF uses a gated oscillator architecture with 70kHz nominal switching frequency and adaptive base drive to maintain switch saturation without overdrive. Its comparator-based feedback loop compares FB/SENSE voltage against a 220mV internal reference, enabling discontinuous-mode operation that reduces quiescent current to 300µA when regulation is met.
It features dual-mode topology support: in step-up mode, SW1 drives the inductor while SW2 connects to ground; in step-down mode, SW1 connects to VIN and SW2 drives the inductor. The integrated auxiliary gain block (A2) functions as a precision low-battery detector with 220mV reference and open-collector AO output capable of sinking 300µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12V ±5% (11.4V–12.6V), internally trimmed for stable rail generation without external resistors |
| Input Voltage Range | 1.0V to 12.6V (step-up), up to 30V (step-down); enables direct use with single alkaline/NiMH cells down to end-of-life voltage |
| Quiescent Current | 300µA typical with switch off; ensures multi-year battery life in remote sensors and pagers |
| Switch Current Limit | User-adjustable via resistor between ILIM and VIN; 400mA with 220Ω, supports safe inductor sizing across input ranges |
| Oscillator Frequency | 52–90kHz (typ. 70kHz); allows use of compact surface-mount inductors (e.g., 47µH) without audible noise |
| Reverse Battery Protection | Limits reverse current to ≤750mA at –1.6V applied to GND/SW2 pins; prevents damage during battery insertion errors |
| Operating Temperature | 0°C to 70°C; validated for commercial portable electronics including palmtops and laser diode drivers |
Pinout & Package
LT1110CS8-12#PBF is housed in an 8-lead plastic SOIC (S8) package, 3.9mm × 4.9mm footprint, with standard JEDEC MS-012AC dimensions and gull-wing leads for reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ILIM (Pin 1) | Current limit programming input | Resistor to VIN sets switch current threshold; 220Ω yields ~400mA limit, preventing inductor saturation at high VIN |
| VIN (Pin 2) | Main power supply input | Accepts 1.0V–30V; powers internal circuitry and switch driver; minimum 1.0V enables single-cell operation |
| SW1 (Pin 3) | Collector of internal NPN power switch | In step-up: connects to inductor/diode node; in step-down: ties directly to VIN rail |
| SW2 (Pin 4) | Emiter of internal NPN power switch | In step-up: connects to GND; in step-down: drives inductor; must not fall below –0.5V |
| GND (Pin 5) | Analog and power ground reference | Common return for feedback, gain block, and oscillator; requires low-impedance PCB connection |
| AO (Pin 6) | Auxiliary gain block output | Open-collector output sinking up to 300µA; used for low-battery flag or linear post-regulator control |
| SET (Pin 7) | Auxiliary gain block inverting input | Connected to resistor divider from VIN; sets trip point for AO output relative to 220mV internal reference |
| FB/SENSE (Pin 8) | Feedback input / voltage sense | On LT1110CS8-12#PBF: internal resistor network fixes output to 12V; no external divider needed |
Key Features
| Feature | Design Value |
|---|---|
| Single-cell start-up capability | Operates from 1.0V input-enables use with depleted alkaline/NiMH cells in pagers and handheld instruments |
| Integrated low-battery detector | On-chip A2 amplifier with 220mV reference and AO output eliminates need for external comparator in battery-monitoring circuits |
| User-programmable switch current limit | External resistor on ILIM pin adjusts peak switch current from ~400mA to 1.5A, optimizing efficiency across wide input ranges |
| Reverse battery protection | Guaranteed operation with –1.6V applied to GND/SW2 pins; prevents destructive reverse-current flow during misinsertion |
| Surface-mount optimized design | 70kHz oscillator and 300µA quiescent current allow full use of compact SMD inductors and tantalum/OS-CON capacitors |
Applications
| Pagers | Cameras |
|---|---|
Use Scenario: Power management in ultra-thin paging devices with single AA/AAA cell. IC Role / Device Role / Timing Role: Step-up DC-DC converter generating stable 12V for LCD backlight driver and RF front-end. Use Value: 300µA quiescent current extends battery life beyond 6 months; 1.0V start-up ensures operation until cell reaches 1.0V. | Use Scenario: Compact digital camera requiring isolated 12V rail for flash capacitor charging. IC Role / Device Role / Timing Role: Fixed-output boost converter supplying 12V from 1.5V alkaline cell with minimal external components. Use Value: Only three external parts (inductor, diode, capacitor) required; reverse battery protection avoids field failures from incorrect battery insertion. |
| Single-Cell to 5V Converters | Laptop and Palmtop Computers |
Use Scenario: Legacy 5V logic rail generation from single NiMH cell in portable test equipment. IC Role / Device Role / Timing Role: Configurable step-up converter using LT1110CS8-12#PBF's 12V output with external LDO for precise 5V regulation. Use Value: On-chip 220mV reference and AO output enable accurate low-battery warning before system brownout. | Use Scenario: Auxiliary 12V supply for docking station peripherals in early palmtop PCs. IC Role / Device Role / Timing Role: Micropower boost converter powering RS-232 transceivers and USB hub controllers from main battery. Use Value: 70kHz switching frequency avoids EMI interference with sensitive analog audio paths; SOIC package fits tight layout constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1983ES6-12#TRMPBF | Higher 1.2MHz switching frequency; 25µA quiescent current; requires external feedback resistors for 12V | Better suited for ultra-low-noise, high-density layouts where small inductors are mandatory | Select LTC1983 if board space is critical and input voltage ≥2.7V; LT1110CS8-12#PBF remains preferred for sub-1.5V start-up |
| MAX756CSA+T | Fixed 5V/12V versions available; 100µA quiescent current; no integrated low-battery detector | Lacks auxiliary gain block; requires external comparator for battery monitoring | Choose MAX756 for cost-sensitive 12V-only apps without battery sensing; LT1110CS8-12#PBF adds functional integration |
Compared with LTC1983ES6-12#TRMPBF and MAX756CSA+T, the LT1110CS8-12#PBF uniquely combines 1.0V start-up, on-chip low-battery detection, and reverse battery protection in a single SOIC package-making it irreplaceable for legacy single-cell portable designs where reliability under misuse conditions is essential.
Availability
LT1110CS8-12#PBF is available at Aetrix Electronics and suitable for pagers, portable cameras, and single-cell to 12V converters requiring stable component supply across extended production lifecycles.
Supply support for LT1110CS8-12#PBF 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 is a global leader in high-performance analog, mixed-signal, and DSP ICs, serving industrial, automotive, communications, and consumer markets with precision power, signal conditioning, and conversion solutions.
The LT1110 product line was designed specifically for micropower DC-DC conversion in battery-critical portable electronics, emphasizing ultra-low start-up voltage, integrated protection, and minimal external component count.
FAQ
What is the minimum input voltage required for LT1110CS8-12#PBF to start regulation?
The LT1110CS8-12#PBF starts regulation at 1.0V input-verified across temperature and process corners. This enables reliable operation with single alkaline, NiMH, or Li-ion cells down to end-of-discharge voltage. Below 1.0V, the internal oscillator remains inactive and no output is generated. The LT1110CS8-12#PBF maintains regulation stability even as input decays from 1.5V to 1.0V in real-world battery discharge profiles.
Can LT1110CS8-12#PBF be used in step-down (buck) configuration?
Yes, LT1110CS8-12#PBF supports step-down operation with input up to 30V and output fixed at 12V. In buck mode, SW1 connects to VIN and SW2 drives the inductor. Output ripple remains within specification when using recommended Schottky diodes and low-ESR capacitors. The LT1110CS8-12#PBF's 1.5A internal switch and ILIM pin current limiting ensure safe operation across varying input conditions.
How does the reverse battery protection work on LT1110CS8-12#PBF?
The LT1110CS8-12#PBF guarantees safe operation with –1.6V applied to GND and SW2 pins while VIN, ILIM, and SW1 remain grounded. Internal circuitry limits reverse current to ≤750mA, preventing latch-up or metallization damage. This protection is intrinsic-not dependent on external components-and is tested per Absolute Maximum Ratings. The LT1110CS8-12#PBF survives repeated reverse insertion events without degradation.
What external components are required for basic LT1110CS8-12#PBF operation?
Only three external components are required: a surface-mount inductor (e.g., 47µH), Schottky catch diode (e.g., MBRS120T3), and output capacitor (e.g., 15µF tantalum). No feedback resistors are needed-the LT1110CS8-12#PBF's internal resistor network fixes output to 12V. Input decoupling (e.g., 10µF ceramic) is recommended if battery leads exceed 2 inches. All parts are standard off-the-shelf items.
Does LT1110CS8-12#PBF include built-in low-battery detection?
Yes, LT1110CS8-12#PBF integrates an auxiliary gain block (A2) with 220mV internal reference and open-collector AO output. By connecting a resistor divider from VIN to GND on the SET pin, designers configure precise low-battery thresholds (e.g., 1.1V). The AO pin sinks 300µA when triggered, directly interfacing with microcontroller GPIOs. This eliminates external comparators and saves board space-core functionality of the LT1110CS8-12#PBF.
LT1110CS8-12#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up, Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck, Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1V
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 12V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.5A (Switch)
- Frequency - Switching:
- 70kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1110CS8-12#PBF FAQ
1.How can I place an order for LT1110CS8-12#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1110CS8-12#PBF 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 LT1110CS8-12#PBF reliable?
The price and inventory of LT1110CS8-12#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1110CS8-12#PBF is usually 5 days.
3.What payment methods are accepted for LT1110CS8-12#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1110CS8-12#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1110CS8-12#PBF?
LT1110CS8-12#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1110CS8-12#PBF 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 LT1110CS8-12#PBF?
For technical support, including LT1110CS8-12#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1110CS8-12#PBF requirements.
6.How does Aetrix verify that LT1110CS8-12#PBF is sourced from the original manufacturer or authorized distributors?
All LT1110CS8-12#PBF 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 LT1110CS8-12#PBF meets industry standards.
7.What is the process for return or replacement of LT1110CS8-12#PBF?
All LT1110CS8-12#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1110CS8-12#PBF, 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 LT1110CS8-12#PBF part is unused and in its original packaging.
Return procedure for LT1110CS8-12#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1110CS8-12#PBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
