My Inquiry
My Account
Analog Devices Inc. LTC1174HVIS8#TRPBF
- Part No.:
- LTC1174HVIS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1174HVIS8#TRPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,840
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1174HVIS8#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, current-mode step-down and inverting DC/DC converter IC with integrated 0.9Ω P-channel MOSFET switch, pin-selectable 340mA/600mA current limit, and wide 4V–18.5V input range. It delivers regulated 5V output (fixed version), achieves up to 94% efficiency at 300mA load, and supports low-battery detection for portable instrumentation and memory backup supply.
For engineers reviewing the LTC1174HVIS8#TRPBF datasheet, LTC1174HVIS8#TRPBF pinout, LTC1174HVIS8#TRPBF application, or LTC1174HVIS8#TRPBF equivalent, key selection criteria include its HV-rated input voltage capability, micropower shutdown (2µA), burst-mode operation for light-load efficiency, and compatibility with standard surface-mount inductors and Schottky catch diodes in compact SO-8 layouts.
Technical Context
The LTC1174HVIS8#TRPBF implements a constant off-time (COT) current-mode control architecture with internal timing capacitor trimming, enabling input-voltage-dependent switching frequency (≈42–111kHz). Its feedback loop uses a 1.25V reference and compares divided output voltage against this threshold via an internal comparator.
It integrates a low-battery detector with 1.25V trip point and hysteresis (7.5–30mV), open-drain LBOUT pin, and pin-selectable peak current limit (via IPGM = VIN or GND). The device transitions automatically between continuous conduction mode and Burst Mode® to maintain high efficiency across 10mA–400mA load range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 18.5V - Supports wide battery input (e.g., 4×NiCd or Li-ion stacks) without external regulators. |
| Output Voltage | Fixed 5V ±2.5% - Regulated output suitable for logic rails and analog subsystems requiring stable 5V supply. |
| Peak Switch Current | 600mA (IPGM = VIN) or 340mA (IPGM = GND) - Enables optimization of inductor size and thermal design per application load. |
| Efficiency | Up to 94% at 300mA - Minimizes power loss and heat generation in space-constrained portable designs. |
| Quiescent Current | 130µA active / 2µA shutdown - Extends battery life in always-on or sleep-mode systems like memory backup. |
| Switch RDS(ON) | 0.9Ω typical at VIN = 9V - Reduces conduction loss and improves light-load regulation without external FET. |
| Operating Frequency | 42–111kHz (VIN-dependent) - Enables use of small, low-cost surface-mount inductors (e.g., 50–100µH) with minimal EMI filtering. |
Pinout & Package
Package: 8-lead plastic SO (SO-8), RoHS-compliant, lead-free (#PBF), tape-and-reel (#TRPBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Feedback input / regulated output sense | Connects to internal resistive divider for fixed 5V output; used as VFB node in adjustable configurations. |
| LBOUT (Pin 2) | Open-drain low-battery indicator output | Sinks up to 1.5mA when LBIN falls below 1.25V; requires external pull-up for LED or MCU interrupt signaling. |
| LBIN (Pin 3) | Inverting input of low-battery comparator | Accepts resistor-divider from VIN to set trip point (e.g., 5.5V); draws only 0.5µA bias current. |
| GND (Pin 4) | Power and signal ground reference | Common return path for switch, feedback, and comparator circuits; must be low-impedance for stability. |
| SW (Pin 5) | Drain of internal P-channel MOSFET | Connects directly to cathode of external Schottky catch diode; handles peak inductor current and switching transients. |
| VIN (Pin 6) | Main input supply connection | Accepts 4–18.5V; requires local 0.1µF ceramic + bulk electrolytic decoupling to suppress high-frequency noise. |
| IPGM (Pin 7) | Current limit selection input | Logic-level input: tie to VIN for 600mA limit, or to GND for 340mA limit; high-impedance, must not float. |
| SHUTDOWN (Pin 8) | Active-low enable control | Pull to GND for <2µA shutdown; leave at VIN or use ≥1.2V logic high for normal operation; no floating allowed. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.9Ω P-channel MOSFET switch | Eliminates need for external high-side switch, reducing BOM count and PCB area in buck/inverting topologies. |
| Pin-selectable current limit (340mA / 600mA) | Allows single footprint to support multiple output current requirements without layout change. |
| Burst Mode® operation | Maintains >85% efficiency down to 10mA load by disabling switching and entering micropower sleep state. |
| Low-battery detector with hysteresis | Provides reliable undervoltage warning using only two external resistors; 7.5–30mV hysteresis prevents chatter near trip point. |
| Only four external components required | Enables complete 5V buck converter with inductor, Schottky diode, input cap, and output cap - ideal for rapid prototyping. |
Applications
| Portable Instrumentation Power | Memory Backup Supply |
|---|---|
Use Scenario: Handheld multimeter powered by 4×AA alkaline cells (4.8–6.8V), requiring clean 5V rail for ADC and microcontroller. IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated 5V from variable battery input; manages battery depletion via LBIN/LBOUT. Use Value: 94% peak efficiency extends runtime; 130µA quiescent current preserves battery during standby; Burst Mode maintains regulation at µA-level loads. | Use Scenario: SRAM data retention circuit in industrial PLC, maintaining 5V during main power failure using supercapacitor or coin cell. IC Role / Device Role / Timing Role: Low-quiescent-current buck converter sustaining 5V rail from backup source; shutdown pin enables seamless switchover control. Use Value: 2µA shutdown current minimizes backup source drain; wide 4–18.5V input accommodates varying supercap voltage decay profiles. |
| 5V to –5V Inverting Converter | Battery-Powered Data Logger |
Use Scenario: Sensor interface board needing dual-rail ±5V supply from single 9V battery for op-amp signal conditioning. IC Role / Device Role / Timing Role: Inverting DC/DC converter generating –5V output referenced to system ground; SW pin drives external diode-inductor network. Use Value: Fixed 5V version (LTC1174-5) simplifies inverting design; 0.9Ω RDS(ON) reduces losses in negative rail generation. | Use Scenario: Remote environmental monitor using Li-ion battery (3.0–4.2V nominal), logging temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Step-down regulator powering MCU and sensors; LBOUT triggers firmware alert before battery reaches critical level. Use Value: Programmable low-battery threshold (e.g., 3.3V) enables precise end-of-life prediction; micropower shutdown extends idle time between logs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1174HVCS8-5#TRPBF | Same HV rating (4–18.5V), but commercial temp grade (0°C to 70°C) vs. industrial (–40°C to 85°C) | Lacks extended temperature qualification; unsuitable for automotive or outdoor industrial deployments | Select only if operating ambient stays within 0°C–70°C and cost sensitivity outweighs reliability margin |
| MAX738AESA+ | Pin-compatible buck controller with 2.5–16.5V input, but requires external MOSFET and lacks integrated low-battery detector | No LBIN/LBOUT functionality; needs additional comparator circuitry for battery monitoring | Choose when higher output current (>600mA) or custom FET selection is required, accepting added component count |
Compared with LTC1174HVCS8-5#TRPBF and MAX738AESA+, the LTC1174HVIS8#TRPBF provides guaranteed industrial temperature operation, integrated low-battery detection, and lower system-level BOM count - making it optimal for ruggedized portable equipment where reliability and integration are prioritized over marginal cost savings.
Availability
LTC1174HVIS8#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation power, memory backup supply, 5V-to–5V inverting conversion, and battery-powered data loggers requiring stable component supply across extended temperature ranges.
Supply support for LTC1174HVIS8#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 product support, documentation, and manufacturing continuity for the LTC portfolio.
The LTC1174 family was designed specifically for high-efficiency, low-component-count DC/DC conversion in battery-powered systems - emphasizing micropower operation, robust input voltage range, and integrated protection features like short-circuit limiting and low-battery indication.
FAQ
What is the maximum input voltage rating for the LTC1174HVIS8#TRPBF?
The LTC1174HVIS8#TRPBF has an absolute maximum input voltage rating of 18.5V on the VIN pin. This HV rating distinguishes it from the standard LTC1174 (13.5V max) and enables direct operation from 12V systems or stacked battery packs without pre-regulation. Operation beyond 18.5V risks permanent damage.
Does the LTC1174HVIS8#TRPBF support adjustable output voltages?
No - the LTC1174HVIS8#TRPBF is the fixed 5V output variant. Adjustable output requires the base LTC1174 part (without suffix), which uses external resistors on the VOUT/VFB pin to set output voltage. The "-5" suffix in LTC1174HVIS8#TRPBF denotes factory-trimmed 5V regulation with ±2.5% tolerance over temperature.
How does the IPGM pin affect current limiting in the LTC1174HVIS8#TRPBF?
The IPGM pin selects the peak inductor current limit: tying IPGM to VIN sets the limit to 600mA, while tying it to GND sets it to 340mA. This adjustment changes the internal current comparator threshold and directly impacts inductor sizing, thermal performance, and short-circuit response - confirmed in the Electrical Characteristics table under IPEAK parameter.
Can the LTC1174HVIS8#TRPBF be used in inverting (positive-to-negative) configurations?
Yes - the LTC1174HVIS8#TRPBF supports inverting operation by reconfiguring the output reference point. As shown in Typical Application TA06, connecting the load between GND and VOUT yields –5V output. The HV rating ensures safe operation when VIN exceeds |VOUT|, and the internal switch remains functional in this topology.
What is the purpose of the LBIN and LBOUT pins on the LTC1174HVIS8#TRPBF?
The LBIN pin is the inverting input of an internal comparator referenced to 1.25V; applying a resistor divider from VIN to LBIN sets the low-battery trip voltage. When LBIN falls below 1.25V, LBOUT (an open-drain N-channel output) pulls low to signal battery depletion - enabling MCU interrupts or LED indicators without additional components.
LTC1174HVIS8#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-Down, Step-Up/Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Buck, Buck-Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 18.5V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 18V
- Current - Output:
- 340mA, 600mA
- Frequency - Switching:
- 200kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LTC1174HVIS8#TRPBF FAQ
1.How can I place an order for LTC1174HVIS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1174HVIS8#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 LTC1174HVIS8#TRPBF reliable?
The price and inventory of LTC1174HVIS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1174HVIS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1174HVIS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1174HVIS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1174HVIS8#TRPBF?
LTC1174HVIS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1174HVIS8#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 LTC1174HVIS8#TRPBF?
For technical support, including LTC1174HVIS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1174HVIS8#TRPBF requirements.
6.How does Aetrix verify that LTC1174HVIS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1174HVIS8#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 LTC1174HVIS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1174HVIS8#TRPBF?
All LTC1174HVIS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1174HVIS8#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 LTC1174HVIS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1174HVIS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1174HVIS8#TRPBF 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…
