My Inquiry
My Account
Analog Devices Inc. LTC1174HVCN8-5#PBF
- Part No.:
- LTC1174HVCN8-5#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LTC1174HVCN8-5#PBF.pdf
- Description:
- IC REG BUCK BOOST 5V 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,010
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1174HVCN8-5#PBF from Analog Devices (formerly Linear Technology) is a high-efficiency, current-mode step-down DC/DC converter IC with integrated 0.9Ω P-channel MOSFET switch, optimized for 5V output from 4V–18.5V input. It delivers up to 175mA continuous output, features pin-selectable 340mA/600mA current limit, 130µA standby current, and low-battery detection - used in portable instrumentation and battery-powered equipment requiring stable 5V rail generation.
For engineers reviewing the LTC1174HVCN8-5#PBF datasheet, LTC1174HVCN8-5#PBF pinout, LTC1174HVCN8-5#PBF application, or LTC1174HVCN8-5#PBF equivalent, key selection criteria include its HV input range (up to 18.5V), fixed 5V output, N8 PDIP package, Burst Mode® operation for light-load efficiency, and compatibility with standard Schottky catch diodes like MBRS140T3.
Technical Context
The LTC1174HVCN8-5#PBF employs a constant off-time (COT) current-mode architecture with internal 1.25V reference and voltage-controlled comparator A1 for regulation. Its switching frequency varies with VIN–VOUT (e.g., ~111kHz at VIN=9V, VOUT=5V), and it automatically transitions between continuous conduction mode and Burst Mode® to maintain high efficiency across load ranges from 1mA to 175mA.
It integrates a low-battery detector with 1.25V threshold on LBIN (Pin 3), driving open-drain LBOUT (Pin 2) with 0.8–1.5mA sink capability, and supports shutdown via active-low SHUTDOWN (Pin 8) with 1–25µA quiescent draw. The IPGM (Pin 7) selects peak current limit (340mA or 600mA), and SW (Pin 5) drives external inductor/diode with 0.9–1.55Ω RDS(ON).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.00V ±2.5% (4.75V–5.25V); eliminates need for external feedback resistors. |
| Input Voltage Range | 4V to 18.5V; supports wide battery chemistries including 12V lead-acid and multi-cell Li-ion stacks. |
| Max Output Current | 175mA continuous (at VIN=9V, L=100µH); limited by thermal design and 600mA peak switch current. |
| Efficiency | Up to 94% at 300mA load (VIN=9V, VOUT=5V); enables minimal heat rise in enclosed portable devices. |
| Quiescent Current | 130µA in sleep mode; extends battery life in always-on monitoring applications. |
| Shutdown Current | 1–25µA (typ. 2µA); suitable for ultra-low-power wake-on-event systems. |
| Switch RDS(ON) | 0.90–1.55Ω (at VIN=9V); defines conduction loss and thermal dissipation under load. |
Pinout & Package
Package: 8-lead PDIP (N8), 0.3-inch width, through-hole mount, RoHS-compliant #PBF finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Regulated 5V output / Feedback node | Fixed-output version ties internal resistive divider to set 5V; connects to output capacitor and load. |
| LBOUT (Pin 2) | Open-drain low-battery indicator output | Sinks up to 1.5mA when LBIN < 1.25V; requires external pull-up for LED or microcontroller interrupt. |
| LBIN (Pin 3) | Inverting input of low-battery comparator | Accepts resistor-divider from VIN; trip point = 1.25V × (R1+R2)/R2; hysteresis = 7.5–30mV. |
| GND (Pin 4) | Power and signal ground reference | Must be low-impedance star point; critical for stability and EMI control in switching layout. |
| SW (Pin 5) | Drain of internal P-channel MOSFET switch | Connects directly to cathode of Schottky catch diode and inductor; high dv/dt node. |
| VIN (Pin 6) | Main input supply (4V–18.5V) | Requires local 0.1µF ceramic + bulk electrolytic decoupling; feeds internal bias and switch. |
| IPGM (Pin 7) | Current limit select input | Pull to VIN → 600mA peak limit; pull to GND → 340mA peak limit; high-impedance when floating. |
| SHUTDOWN (Pin 8) | Active-low enable/disable control | Logic-low (<0.75V) disables switching and reduces IQ to µA range; must not float. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® operation | Reduces quiescent current to 130µA at light loads while maintaining tight output regulation. |
| Pin-selectable current limit | Enables optimization of inductor size and thermal performance for 340mA or 600mA peak current. |
| Integrated 0.9Ω P-MOSFET | Eliminates external high-side switch; simplifies BOM and improves reliability over discrete solutions. |
| Low-battery detection with hysteresis | Provides programmable undervoltage warning (e.g., 5.5V trip) without external comparators or references. |
| Only four external components required | Inductor, Schottky diode, input capacitor, output capacitor - minimizes footprint and assembly cost. |
Applications
| Handheld Medical Instrumentation | Industrial Sensor Node Power |
|---|---|
Use Scenario: Battery-powered glucose meter with LCD display and analog front-end requiring clean, stable 5V rail during intermittent measurement cycles. IC Role / Device Role / Timing Role: Primary step-down regulator converting 2×AA (2.4–3.2V) boosted to 5V or 9V alkaline to regulated 5V output. Use Value: 94% peak efficiency and 130µA sleep current extend single-battery life beyond 12 months in standby. | Use Scenario: Wireless temperature/humidity sensor node powered by 3.6V Li-SOCl₂ primary cell, needing 5V for RF transceiver and MCU during transmission bursts. IC Role / Device Role / Timing Role: High-input-voltage buck converter accepting up to 18.5V transient surges while delivering precise 5V during 100ms TX windows. Use Value: 18.5V absolute max rating and robust short-circuit protection prevent field failure in harsh industrial environments. |
| Portable Test Equipment | Memory Backup Supply |
Use Scenario: Handheld multimeter with auto-ranging ADC, OLED display, and USB charging circuitry requiring isolated 5V domain. IC Role / Device Role / Timing Role: Main power stage generating 5V from variable input (USB 5V or 9V battery), with LBOUT signaling battery depletion to firmware. Use Value: Integrated low-battery comparator eliminates external supervisor IC, reducing component count and board area. | Use Scenario: SRAM backup in embedded controller where main 5V rail may fail during brownout or power interruption. IC Role / Device Role / Timing Role: Inverting converter generating –5V from main 5V rail to bias backup supercapacitor or nonvolatile RAM. Use Value: Pin-compatible LTC1174HVCN8-5#PBF variant supports both step-down and inverting topologies with same PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1174CN8-5#PBF | Standard input range (–0.3V to 13.5V); lower max VIN than HV variant. | Not suitable for >13.5V input sources (e.g., 12V automotive transients, 16V LiPo packs). | Select only if input never exceeds 13.5V; otherwise LTC1174HVCN8-5#PBF provides necessary headroom. |
| LT1931IS5#TRMPBF | Fixed 5V output, 1.2MHz constant-frequency PWM, 1.5A switch, SOT-23-5 package. | Higher current, smaller footprint, but higher quiescent current (1.1mA vs 130µA) and no low-battery detection. | Choose for space-constrained designs needing >200mA; avoid when micropower or battery monitoring is critical. |
Compared with LTC1174CN8-5#PBF, the LTC1174HVCN8-5#PBF adds 5V headroom for transient-tolerant designs; compared with LT1931IS5#TRMPBF, it trades higher peak current for 85% lower quiescent draw and integrated battery monitoring - making it optimal for long-life, low-duty-cycle battery systems.
Availability
LTC1174HVCN8-5#PBF is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor nodes, handheld test equipment, and memory backup supplies requiring stable component supply, long-lifecycle support, and RoHS-compliant through-hole packaging.
Supply support for LTC1174HVCN8-5#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC1174 product line was designed by Linear Technology specifically for low-quiescent-current, high-efficiency DC/DC conversion in battery-powered and portable applications - emphasizing simplicity, reliability, and minimal external component count.
FAQ
What is the maximum input voltage rating for the LTC1174HVCN8-5#PBF?
The LTC1174HVCN8-5#PBF has an absolute maximum input voltage rating of 18.5V on the VIN pin (Pin 6). This HV rating distinguishes it from the standard LTC1174CN8-5#PBF (13.5V max), enabling use with 12V nominal systems experiencing load-dump transients or multi-cell Li-ion batteries. Operation above 18.5V risks permanent damage.
Does the LTC1174HVCN8-5#PBF require external feedback resistors to regulate 5V output?
No. The LTC1174HVCN8-5#PBF is the fixed 5V output variant - internal precision resistive dividers set VOUT to 4.75V–5.25V (±2.5%) without any external components. Only the adjustable LTC1174 (non-suffixed) requires external R1/R2 on the VFB pin to program output voltage.
How does the IPGM pin affect current limiting on the LTC1174HVCN8-5#PBF?
The IPGM pin (Pin 7) selects the peak inductor current limit: pulling IPGM to VIN sets 600mA limit (typ.), while pulling to GND sets 340mA (typ.). This allows designers to match inductor saturation current and optimize efficiency across load ranges - critical for thermal management in sealed enclosures.
Can the LTC1174HVCN8-5#PBF be used in inverting (positive-to-negative) configurations?
Yes - the LTC1174HVCN8-5#PBF supports inverting topologies. When configured as a negative-output converter (e.g., +9V to –5V), the GND pin becomes the output reference, and VOUT (Pin 1) delivers –5V. Input voltage headroom must account for absolute max ratings: VIN – VOUT ≤ 18.5V, so max input is 13.5V for –5V output.
What is the purpose of the LBIN and LBOUT pins on the LTC1174HVCN8-5#PBF?
LBIN (Pin 3) is the inverting input of an internal comparator referenced to 1.25V; connecting a resistor divider from VIN to LBIN sets the low-battery trip point (e.g., 5.5V). LBOUT (Pin 2) is an open-drain output that sinks up to 1.5mA when LBIN falls below threshold - used to drive LEDs or microcontroller interrupts without external circuitry.
LTC1174HVCN8-5#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up, Step-Down, Step-Up/Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Buck, Buck-Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 18.5V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 340mA, 600mA
- Frequency - Switching:
- 200kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LTC1174HVCN8-5#PBF FAQ
1.How can I place an order for LTC1174HVCN8-5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1174HVCN8-5#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 LTC1174HVCN8-5#PBF reliable?
The price and inventory of LTC1174HVCN8-5#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1174HVCN8-5#PBF is usually 5 days.
3.What payment methods are accepted for LTC1174HVCN8-5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1174HVCN8-5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1174HVCN8-5#PBF?
LTC1174HVCN8-5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1174HVCN8-5#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 LTC1174HVCN8-5#PBF?
For technical support, including LTC1174HVCN8-5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1174HVCN8-5#PBF requirements.
6.How does Aetrix verify that LTC1174HVCN8-5#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1174HVCN8-5#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 LTC1174HVCN8-5#PBF meets industry standards.
7.What is the process for return or replacement of LTC1174HVCN8-5#PBF?
All LTC1174HVCN8-5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1174HVCN8-5#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 LTC1174HVCN8-5#PBF part is unused and in its original packaging.
Return procedure for LTC1174HVCN8-5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1174HVCN8-5#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…
