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Analog Devices Inc. LT8362IDD#PBF
- Part No.:
- LT8362IDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LT8362IDD#PBF.pdf
- Description:
- IC REG BOOST SEPIC 2A 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,490
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Product details
Overview
LT8362IDD#PBF from Analog Devices is a current-mode DC/DC converter IC with a 60V, 2A internal power switch, operating from 2.8V to 60V input. It supports boost, SEPIC, and inverting topologies via a single FBX feedback pin, delivers 48V at 700mA from 24V input in typical boost configuration, and achieves ultralow 9µA quiescent current in Burst Mode for battery-powered medical diagnostics and portable electronics.
For engineers reviewing the LT8362IDD#PBF datasheet, LT8362IDD#PBF pinout, LT8362IDD#PBF application, or LT8362IDD#PBF equivalent, key selection considerations include its 3mm × 3mm DFN package with exposed thermal pad, programmable 300kHz–2MHz switching frequency, SYNC/MODE pin configurable for Burst Mode or SSFM, BIAS pin for efficiency optimization, and AEC-Q100-qualified temperature range (–40°C to 125°C).
Technical Context
The LT8362IDD#PBF implements fixed-frequency current-mode control with external RT-resistor-programmable oscillator (300kHz–2MHz) and dual error amplifier architecture-A1 active for positive-output (FBX = +1.6V reference), A2 active for negative-output (FBX = –0.8V reference). Its single FBX pin enables topology reconfiguration without hardware change.
It integrates frequency foldback during startup/fault, programmable soft-start via SS pin (2µA charge current), and five SYNC/MODE pin states: Burst Mode (<0.14V), pulse-skip (floating), sync-to-external-clock, and two Spread Spectrum Frequency Modulation (SSFM) variants-enabling EMI reduction while maintaining regulation across load ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8V to 60V - supports wide-range industrial, automotive, and telecom inputs without pre-regulation |
| Switch Rating | 60V, 2A - enables 48V boost output with margin; RDS(ON) = 165mΩ ensures low conduction loss at 0.5A |
| Quiescent Current | 9µA in Burst Mode - sustains >100-hour runtime on coin-cell batteries in portable diagnostic equipment |
| Feedback Reference | +1.60V or –0.80V - single FBX pin selects topology; ±0.036V/±0.020V tolerance ensures ≤1% output voltage accuracy |
| Switching Frequency | 300kHz to 2MHz - RT resistor sets exact frequency; 20kΩ yields 2MHz for compact magnetics and reduced EMI |
| Thermal Package | 10-lead 3mm × 3mm DFN with exposed PGND pad - θJA = 43°C/W enables 2A continuous operation at TJ ≤ 125°C |
| UVLO Threshold | Rising: 1.68V, Falling: 1.60V - 80mV hysteresis prevents oscillation during brownout; programmable via resistive divider |
Pinout & Package
LT8362IDD#PBF uses a thermally enhanced 10-lead 3mm × 3mm plastic DFN package with exposed PGND/GND pad (Pin 11) requiring soldering to PCB ground plane for thermal and electrical integrity. θJA = 43°C/W, θJC not specified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Power Switch Output | Drives external inductor/diode; rated 60V/2A; minimize trace area to reduce EMI |
| 2 SYNC/MODE | Mode Control & Clock Input | Selects Burst/Pulse-Skip/Sync/SSFM; thresholds: <0.14V (Burst), >1.7V (Pulse-Skip+SSFM), 0.4–1.7V (clock sync) |
| 3 SS | Soft-Start Timing | 2µA constant-current charge; capacitor value sets inrush current ramp rate and peak inductor current limit |
| 4 RT | Oscillator Frequency Set | Resistor to GND programs fSW: 20kΩ → 2MHz; 165kΩ → 300kHz; enables precise EMI band placement |
| 5 FBX | Topology-Agnostic Feedback | +1.60V ref for boost/SEPIC; –0.80V ref for inverting; regulates VOUT regardless of polarity |
| 6 EN/UVLO | Enable & Input Undervoltage Lockout | 1.60V falling threshold disables switching; 1.68V rising threshold resumes; 80mV hysteresis prevents chatter |
| 7 VIN | Main Input Supply | 2.8V–60V input; local 10µF ceramic bypass required; powers INTVCC unless BIAS is active |
| 8 INTVCC | Internal 3.2V Regulator Output | Bypass with 1µF ceramic; no external loading permitted; powered by VIN or BIAS (if 4.4V ≤ BIAS ≤ VIN) |
| 9 BIAS | Secondary Input for INTVCC | Reduces VIN supply current by >90% when sourcing INTVCC; must be 4.4V–VIN; tie to GND if unused |
| 10 VC | Error Amplifier Output | Connect external RC compensation network here; sets loop bandwidth and phase margin for stability |
| 11 PGND/GND | Power & Signal Ground | Exposed pad; must be soldered to solid PCB ground plane for thermal dissipation and low-noise reference |
Key Features
| Feature | Design Value |
|---|---|
| Single-Pin Topology Selection | FBX pin accepts +1.60V or –0.80V reference to configure boost/SEPIC/inverting without external component changes |
| Ultralow Quiescent Current | 9µA in Burst Mode maintains high light-load efficiency and extends battery life in portable medical devices |
| Spread Spectrum Frequency Modulation | ±14–28% frequency deviation reduces peak EMI by >10dB; enabled via SYNC/MODE pin configuration |
| BIAS Pin Efficiency Optimization | Redirects INTVCC current from VIN to secondary supply (e.g., VOUT in SEPIC), cutting input supply current by up to 95% |
| Programmable UVLO with Hysteresis | EN/UVLO pin allows system-level brownout protection with 80mV hysteresis to prevent oscillation during voltage recovery |
Applications
| Portable Medical Diagnostics | Automotive Infotainment Power |
|---|---|
Use Scenario: Handheld ultrasound or glucose meter requiring stable 48V bias from 12V vehicle battery or Li-ion pack. IC Role / Device Role / Timing Role: Boost converter generating regulated 48V output; FBX pin configured for positive feedback; SYNC/MODE set to Burst Mode for standby efficiency. Use Value: 9µA quiescent current enables multi-day battery operation; 60V switch withstands load-dump transients up to 60V. | Use Scenario: Powering LCD backlight or RF module in automotive head unit with input ranging from 5.5V (cold crank) to 18V (load dump). IC Role / Device Role / Timing Role: SEPIC converter providing non-inverting 12V output; BIAS pin tied to VOUT to improve full-load efficiency by 3–5%. Use Value: AEC-Q100 qualification ensures reliability; SSFM reduces conducted EMI to meet CISPR 25 Class 5 limits. |
| Industrial Sensor Transmitter | Telecom Remote Radio Unit |
Use Scenario: 4–20mA loop-powered sensor with integrated microcontroller needing isolated 3.3V and 15V rails from 24V loop supply. IC Role / Device Role / Timing Role: Inverting converter generating –15V rail; FBX pin referenced to –0.80V; RT resistor set to 45.3kΩ for 1MHz switching. Use Value: Single FBX architecture eliminates need for separate inverting controller; minimum off-time of 50ns supports high-duty-cycle operation at low input voltages. | Use Scenario: Remote radio head requiring 28V bias for PA stage from 48V telecom supply, with strict EMI requirements. IC Role / Device Role / Timing Role: Boost converter with SYNC/MODE pin driven by system clock for synchronization; SSFM enabled to suppress narrowband emissions. Use Value: 2MHz max switching frequency allows use of small 2.2µH inductors; 165mΩ RDS(ON) limits conduction loss to <0.5W at 2A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3789EFE#PBF | Requires external MOSFETs; supports synchronous rectification; no integrated 2A switch; higher external component count | Better suited for >5A output or >95% efficiency targets; lacks Burst Mode IQ <10µA | Choose LTC3789EFE#PBF only when output current exceeds 2A or synchronous FET control is mandatory |
| TPS61088RHLR | Lower 2.7V–12V input range; 12V max switch; 10A peak current; no BIAS pin or SSFM; 25µA IQ in shutdown | Optimized for USB PD and single-cell Li-ion; unsuitable for 48V boost or automotive 60V transients | Choose TPS61088RHLR for cost-sensitive consumer applications below 12V input; avoid for industrial/automotive 60V-rated designs |
Compared with LTC3789EFE#PBF and TPS61088RHLR, the LT8362IDD#PBF uniquely combines integrated 60V/2A switch, single-pin topology selection, 9µA Burst Mode IQ, and SSFM in a 3mm × 3mm DFN-making it optimal for space-constrained, wide-input, low-IQ applications where external FETs or narrow input ranges are unacceptable.
Availability
LT8362IDD#PBF is available at Aetrix Electronics and suitable for portable medical diagnostics, automotive infotainment power, and industrial sensor transmitter applications requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for LT8362IDD#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 digital signal processing semiconductors, serving precision instrumentation, industrial automation, and automotive safety markets.
The LT8362IDD#PBF belongs to the LT® monolithic DC/DC converter product line, designed specifically for wide-input, high-voltage, low-quiescent-current power conversion in harsh environments including automotive, medical, and telecom infrastructure.
FAQ
What is the maximum output voltage achievable with LT8362IDD#PBF in boost configuration?
The LT8362IDD#PBF supports output voltages up to 60V in boost topology, limited by its 60V-rated internal switch and absolute maximum SW pin rating. Practical outputs such as 48V are demonstrated in the datasheet with 24V input and 700mA load. Exceeding 60V risks switch breakdown; external clamp circuits are not supported.
Can LT8362IDD#PBF operate from a 3.3V input to generate 5V output?
Yes, the LT8362IDD#PBF operates from 2.8V minimum input, making 3.3V-to-5V boost fully supported. Configure FBX for +1.60V reference using R1/R2 divider per datasheet equation; select RT for desired frequency (e.g., 1MΩ for ~300kHz); ensure inductor saturation current exceeds peak switch current.
How does the BIAS pin improve efficiency in LT8362IDD#PBF designs?
The BIAS pin supplies the INTVCC regulator when 4.4V ≤ BIAS ≤ VIN, diverting up to 95% of INTVCC current away from VIN. In SEPIC applications where VOUT ≈ VIN, connecting BIAS to VOUT cuts total input current and improves full-load efficiency by 3–5%, directly reducing thermal stress on the input source.
Is LT8362IDD#PBF pin-compatible with other LT836x variants like LT8361IDD#PBF?
No, LT8362IDD#PBF is not pin-compatible with LT8361IDD#PBF. While both use the same 10-lead DFN package, LT8361 has different pin functions: its MODE pin is dedicated to Burst/Pulse-Skip selection only, whereas LT8362IDD#PBF's SYNC/MODE pin adds clock synchronization and SSFM capability-requiring distinct PCB layout and routing.
What thermal derating applies to LT8362IDD#PBF at 125°C ambient?
At 125°C ambient, LT8362IDD#PBF junction temperature must remain ≤125°C (I-grade rating). With θJA = 43°C/W, maximum allowable power dissipation is (125°C – 125°C)/43 ≈ 0W - meaning full 2A load requires active cooling or reduced ambient. Derate output current to ≤1.2A at 125°C ambient with 2-layer 1oz copper and 2cm² thermal pad.
LT8362IDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost, SEPIC
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.8V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- 60V (Switch)
- Current - Output:
- 2A (Switch)
- Frequency - Switching:
- 300kHz ~ 2MHz
- Synchronous Rectifier:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
LT8362IDD#PBF FAQ
1.How can I place an order for LT8362IDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8362IDD#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 LT8362IDD#PBF reliable?
The price and inventory of LT8362IDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8362IDD#PBF is usually 5 days.
3.What payment methods are accepted for LT8362IDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8362IDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8362IDD#PBF?
LT8362IDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8362IDD#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 LT8362IDD#PBF?
For technical support, including LT8362IDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8362IDD#PBF requirements.
6.How does Aetrix verify that LT8362IDD#PBF is sourced from the original manufacturer or authorized distributors?
All LT8362IDD#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 LT8362IDD#PBF meets industry standards.
7.What is the process for return or replacement of LT8362IDD#PBF?
All LT8362IDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8362IDD#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 LT8362IDD#PBF part is unused and in its original packaging.
Return procedure for LT8362IDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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