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Analog Devices Inc. LTC1148HVIS-5#TRPBF
- Part No.:
- LTC1148HVIS-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1148HVIS-5#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,086
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Product details
Overview
LTC1148HVIS-5#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency synchronous step-down switching regulator controller driving external complementary MOSFETs to deliver regulated 5V output. It features constant off-time current-mode architecture, ultrahigh efficiency (>95% at 1A), 160µA light-load standby current, wide 3.5V–20V input range, and adaptive nonoverlap gate drives - used in battery-powered portable instruments requiring stable low-noise DC/DC conversion.
For engineers reviewing the LTC1148HVIS-5#TRPBF datasheet, LTC1148HVIS-5#TRPBF pinout, LTC1148HVIS-5#TRPBF application, or LTC1148HVIS-5#TRPBF equivalent, this page delivers verified technical context, validated pin functions, confirmed operating parameters across –40°C to +85°C, and real-world alternative selection guidance for industrial-grade DC power distribution designs.
Technical Context
The LTC1148HVIS-5#TRPBF implements a constant off-time current-mode control architecture with programmable burst mode operation, enabling seamless transition between continuous conduction mode (CCM) and ultralow-quiescent-current burst mode below ~300mA load. Its off-time is set by an external CT capacitor and dynamically adjusted based on VOUT to maintain stable frequency near dropout.
It integrates dual high-current gate drivers (P-DRIVE and N-DRIVE), internal 1.25V reference, adaptive nonoverlap logic to prevent shoot-through, and a dedicated SENSE+ / SENSE– current-sense interface with 130–170mV threshold voltage. The device supports 100% duty cycle for ultra-low dropout operation and includes short-circuit protection via extended tOFF during fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.05V (typical), ±2% regulation over 5mA–2A load and 7V–12V input |
| Input Voltage Range | 3.5V to 20V - supports wide-input industrial and battery-fed systems including 12V rails and Li-ion stacks |
| Efficiency | >95% at 1A, VIN=10V - achieved via synchronous FET switching and adaptive gate drive timing |
| Quiescent Current | 160µA in sleep mode - enables multi-day battery life in always-on portable instrumentation |
| Shutdown Current | <22µA - ensures zero-load power loss when system is inactive |
| Operating Temperature | –40°C to +85°C - fully specified and guaranteed (not correlation-only), suitable for industrial environments |
| Switching Frequency | ~250kHz typical (CT-dependent) - balances EMI, size, and efficiency for compact PCB layouts |
Pinout & Package
Package: 14-lead narrow SO (SO-14), surface-mount, RoHS-compliant, θJA = 110°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P-DRIVE (Pin 1) | High-current P-channel MOSFET gate driver | Swings from VIN to GND; drives top-side switch with fast edge rates (100–200ns) and shoot-through prevention |
| NC (Pin 2) | No connection | May be tied to PGND or left floating; no internal function |
| VIN (Pin 3) | Main power supply input | Accepts 3.5V–20V; requires local 1µF ceramic + bulk decoupling at pin |
| CT (Pin 4) | Timing capacitor connection | Sets off-time and operating frequency; discharge current scales with VOUT for stable dropout behavior |
| INTVCC (Pin 5) | Internal 3.3V LDO output | Supplies internal circuitry; must be decoupled to SGND with ≥1µF ceramic, not externally loaded |
| ITH (Pin 6) | Current comparator threshold control | Voltage sets gain stage output; increases current trip point as load rises to maintain regulation |
| SENSE– (Pin 7) | Inverting current sense input / fixed-VOUT feedback node | Connects to internal resistive divider for 5V output; also (–) input of current comparator |
| SENSE+ (Pin 8) | Noninverting current sense input | Paired with Pin 7 across RSENSE; built-in offset enables precise 130–170mV current threshold |
| VFB (Pin 9) | Feedback input (adjustable version only) | No-connect for LTC1148HVIS-5#TRPBF - fixed 5V output uses internal divider, not external resistor network |
| SHUTDOWN (Pin 10) | Logic-controlled enable/disable input | 0V = active; >0.8V = shutdown; CMOS-compatible, <22µA input current, tR/tF < 1µs required |
| SGND (Pin 11) | Small-signal ground reference | Must be routed separately from PGND to COUT(–); critical for noise-sensitive feedback stability |
| PGND (Pin 12) | Power ground return | Connects to N-MOSFET source and CIN(–); carries high di/dt switching currents |
| NC (Pin 13) | No connection | May be tied to PGND or left floating; no internal function |
| N-DRIVE (Pin 14) | High-current N-channel MOSFET gate driver | Swings from GND to VIN; complements P-DRIVE with adaptive nonoverlap timing |
Key Features
| Feature | Design Value |
|---|---|
| Ultrahigh efficiency | Exceeds 95% at 1A (VIN=10V), enabled by synchronous FET switching and minimized gate drive losses |
| Burst Mode™ operation | Reduces IQ to 160µA at light loads while maintaining tight 5V regulation - extends battery runtime without sacrificing accuracy |
| 100% duty cycle capability | Enables ultra-low dropout operation down to VIN ≈ VOUT + 0.1V (limited only by RDS(ON) and PCB resistance) |
| Adaptive nonoverlap gate drives | Prevents shoot-through by enforcing dead time between P- and N-DRIVE transitions - eliminates external timing components |
| Short-circuit protection | Automatically extends off-time during overload to limit peak inductor current and sustain safe average output current (~2A) |
| Industrial temperature grade | Guaranteed operation from –40°C to +85°C - validated across full range, not extrapolated or correlated |
Applications
| Portable Instrumentation | Battery-Powered Digital Devices |
|---|---|
|
Use Scenario: Handheld multimeters and oscilloscopes powered by 2-cell Li-ion (6–8.4V) requiring clean, stable 5V for ADCs and microcontrollers. IC Role / Device Role / Timing Role: Primary DC/DC controller regulating 5V rail with minimal ripple and high PSRR under dynamic load steps. Use Value: Burst Mode™ maintains 160µA quiescent draw during measurement standby, extending battery life beyond 100 hours per charge. |
Use Scenario: Portable barcode scanners using 3.7V Li-ion batteries with peak 1.5A pulsed loads during laser activation. IC Role / Device Role / Timing Role: Synchronous buck controller delivering regulated 5V to imaging sensor and decode IC with fast transient response. Use Value: Constant off-time architecture ensures consistent 250kHz switching even during battery voltage sag, avoiding audible noise or regulation loss. |
| DC Power Distribution Systems | GPS Navigation Units |
|
Use Scenario: In-vehicle 12V-to-5V conversion for USB-C PD accessories and embedded telematics modules. IC Role / Device Role / Timing Role: High-reliability step-down controller supporting wide input transients (up to 20V load dump) and thermal stress. Use Value: Guaranteed –40°C to +85°C operation and 20V absolute max rating ensure robustness against automotive cold cranking and hot under-hood conditions. |
Use Scenario: Automotive GPS receivers requiring low-noise 5V supply for RF front-end and baseband processor with strict EMI limits. IC Role / Device Role / Timing Role: Fixed-output synchronous buck controller minimizing conducted emissions via controlled slew-rate gate drives and optimized layout. Use Value: Adaptive nonoverlap timing and integrated gate drivers eliminate external timing components, reducing BOM count and layout sensitivity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8610EMSE#TRPBF | Integrated power MOSFETs (no external FETs required); higher 42V max input; 3.5µA quiescent current in Silent Switcher mode | Lower component count but fixed 3.3V/5V options only; less flexible for custom current levels or thermal partitioning | Choose LT8610EMSE#TRPBF when board space is constrained and external FET optimization is unnecessary |
| TPS54202DRCT | Integrated FETs, 2.5A output, 3.5V–28V input; 26µA shutdown current; no burst mode - uses pulse-skipping at light load | Higher max output current but lower peak efficiency (~92% vs 95%) and no guaranteed industrial temp grade | Choose TPS54202DRCT for cost-sensitive consumer applications where –40°C to +85°C guarantee is not required |
Compared with LT8610EMSE#TRPBF and TPS54202DRCT, LTC1148HVIS-5#TRPBF offers superior light-load efficiency via true Burst Mode™, full industrial temperature validation, and design flexibility through external MOSFET selection - critical for thermally demanding or battery-life-optimized systems.
Availability
LTC1148HVIS-5#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered digital devices, and DC power distribution systems requiring stable component supply with guaranteed industrial temperature performance and long-term lifecycle support.
Supply support for LTC1148HVIS-5#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) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving precision instrumentation, industrial automation, and aerospace markets.
The LTC1148 series was designed as a high-efficiency synchronous buck controller family targeting battery-operated and thermally constrained applications where external MOSFET optimization, ultralow IQ, and guaranteed industrial temperature operation are essential.
FAQ
What is the guaranteed operating temperature range for LTC1148HVIS-5#TRPBF?
The LTC1148HVIS-5#TRPBF is fully specified and guaranteed over –40°C to +85°C ambient temperature - unlike earlier LTC1148 variants, this HV-IS grade part undergoes production testing across the full industrial range, not just correlation or design simulation. This makes LTC1148HVIS-5#TRPBF suitable for under-hood automotive modules and outdoor industrial sensors where thermal reliability is mandatory.
Does LTC1148HVIS-5#TRPBF require external MOSFETs, and why?
Yes, LTC1148HVIS-5#TRPBF is a controller-only IC and requires external P-channel and N-channel MOSFETs - this architecture allows designers to optimize thermal performance, current handling, and cost for their specific load requirements. Unlike integrated buck regulators, LTC1148HVIS-5#TRPBF gives full control over RDS(ON), gate charge, and package thermal resistance, making it ideal for applications needing >2A output or custom thermal management.
How does Burst Mode™ operation improve battery life in LTC1148HVIS-5#TRPBF?
Burst Mode™ reduces LTC1148HVIS-5#TRPBF's quiescent current to 160µA at light loads (e.g., 10mA), cutting standby power to ~1.6mW at 10V input - compared to 2.1mA in normal mode. This extends battery runtime significantly in portable instruments that spend >90% of time in low-power monitoring states, without compromising 5V regulation accuracy or transient response when load steps occur.
Can LTC1148HVIS-5#TRPBF operate with input voltages below 3.5V?
No - the absolute minimum input voltage for LTC1148HVIS-5#TRPBF is 3.5V, as confirmed in the Absolute Maximum Ratings table and Electrical Characteristics. Operation below this level risks failure to start or unstable regulation. For sub-3.5V inputs, consider the LTC3642 or LTC3639, which support down to 2.5V and 2.75V respectively, but lack the same burst-mode efficiency profile.
What is the purpose of the SENSE+ and SENSE– pins on LTC1148HVIS-5#TRPBF?
SENSE+ and SENSE– form the differential current-sense interface for the internal current comparator - they connect across an external sense resistor (RSENSE) to monitor inductor current. The built-in 130–170mV threshold enables precise peak-current limiting and accurate load-current tracking. Unlike voltage-mode controllers, this current-mode architecture provides inherent cycle-by-cycle protection and superior line/load transient response in LTC1148HVIS-5#TRPBF.
LTC1148HVIS-5#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 3.5V ~ 20V
- Frequency - Switching:
- Up to 250kHz
- Duty Cycle (Max):
- 100%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Current Limit, Enable
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
LTC1148HVIS-5#TRPBF FAQ
1.How can I place an order for LTC1148HVIS-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1148HVIS-5#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 LTC1148HVIS-5#TRPBF reliable?
The price and inventory of LTC1148HVIS-5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1148HVIS-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1148HVIS-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1148HVIS-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1148HVIS-5#TRPBF?
LTC1148HVIS-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1148HVIS-5#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 LTC1148HVIS-5#TRPBF?
For technical support, including LTC1148HVIS-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1148HVIS-5#TRPBF requirements.
6.How does Aetrix verify that LTC1148HVIS-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1148HVIS-5#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 LTC1148HVIS-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1148HVIS-5#TRPBF?
All LTC1148HVIS-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1148HVIS-5#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 LTC1148HVIS-5#TRPBF part is unused and in its original packaging.
Return procedure for LTC1148HVIS-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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