My Inquiry
My Account
Analog Devices Inc. LT8602ILXE#PBF
- Part No.:
- LT8602ILXE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 48-LQFP Exposed Pad
- Datasheet:
-
LT8602ILXE#PBF.pdf
- Description:
- IC REG BUCK ADJ QUAD 48ELQFP
- Quantity:
- Payment:
- Shipping:
Inventory:268
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT8602ILXE#PBF from Analog Devices is a quad-channel monolithic synchronous step-down regulator with two 42V-input high-voltage channels (1.5A and 2.5A) and two 5.5V-input low-voltage channels (1.8A each), programmable 250kHz–2.2MHz switching frequency, 30µA quiescent current in Burst Mode®, and integrated power-on reset with adjustable delay. It serves as a compact, multi-rail power management IC for automotive infotainment and industrial control systems requiring four regulated outputs from wide-input sources.
For engineers reviewing the LT8602ILXE#PBF datasheet, LT8602ILXE#PBF pinout, LT8602ILXE#PBF application, or LT8602ILXE#PBF equivalent, key selection considerations include channel-specific input voltage ranges (3–42V HV vs. 2.6–5.5V LV), independent PVIN pins per channel, 2-phase clocking to reduce input ripple, open-drain PG1–PG4 indicators, and CPOR/POREN-based POR timing configuration.
Technical Context
The LT8602ILXE#PBF integrates four independent current-mode buck regulators sharing a single oscillator with 180° phase shift between Channel 1/3 and Channel 2/4. High-voltage channels (1 & 2) use internal 1V feedback reference and TRKSS-programmable soft-start; low-voltage channels (3 & 4) use fixed 800mV reference, RUN-pin enable, and 1ms internal soft-start.
Each channel features cycle-by-cycle current limiting, reverse-current protection, and dedicated power-good comparators with ±8% threshold hysteresis. The device supports micropower Burst Mode® operation (30µA IQ with all channels active) and external synchronization via SYNC pin, with thermal shutdown and UVLO on all PVIN inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range (HV Channels) | 3V to 42V - supports direct connection to automotive battery or industrial 24V/36V rails without pre-regulation. |
| Input Voltage Range (LV Channels) | 2.6V to 5.5V - enables cascaded operation from HV outputs (e.g., 3.3V or 5V rails powering 1.8V/1.2V logic). |
| Output Current (Ch1 / Ch2 / Ch3 / Ch4) | 1.5A / 2.5A / 1.8A / 1.8A - defines maximum continuous load per rail under thermal limits at 125°C junction. |
| Quiescent Current (All Channels Active) | 30µA in Burst Mode® at 12VIN - enables always-on subsystems (e.g., CAN wake-up circuitry) with minimal standby drain. |
| Switching Frequency Range | 250kHz to 2.2MHz - set by RT resistor; higher frequencies allow smaller inductors/capacitors; lower frequencies improve light-load efficiency. |
| Power-On Reset Delay | 31–39.4ms (with 1nF CPOR) - provides deterministic system-level reset timing after input stabilization, configurable up to ~400ms. |
| Efficiency (Typical) | Up to 93% (HV), 94% (LV) - achieved via synchronous rectification and optimized MOSFET RDS(ON) (e.g., 150mΩ top / 100mΩ bottom for Ch2). |
Pinout & Package
LT8602ILXE#PBF is housed in a 48-lead 7mm × 7mm plastic eLQFP package with exposed pad (Pin 49 = GND). All GND pins (2, 3, 10, 11, 15, 18, 20, 22, 30, 39, 41, 43, 46) and the exposed pad must be soldered to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN1, PVIN2 | HV Input Supplies | Independent 3–42V inputs for Channels 1 and 2; require local low-ESR bypass capacitors to adjacent GND pins. |
| PVIN3, PVIN4 | LV Input Supplies | 2.6–5.5V inputs for Channels 3 and 4; typically connected to HV outputs (e.g., 3.3V/5V rails); each has 2.35V UVLO. |
| FB1–FB4 | Feedback Inputs | Regulate to 1.0V (Ch1/Ch2) or 0.8V (Ch3/Ch4); determine output voltage via external resistor divider; sensitive to noise-route away from SW nodes. |
| PG1–PG4 | Open-Drain Power-Good Indicators | Assert low when corresponding VOUT deviates >8% from target; require external pull-up; valid only after INTVCC ≥2.7V. |
| RST, POREN, CPOR | Power-On Reset Interface | POREN enables POR timer; CPOR sets delay (2µA pull-up); RST is open-drain reset output active low until timeout completes. |
| SYNC, RT | Frequency Control | RT sets oscillator frequency (250kHz–2.2MHz); SYNC accepts external clock or configures Burst Mode® (GND) / pulse-skip (high). |
| TRKSS1, TRKSS2 | Track/Soft-Start Inputs | Programmable soft-start for HV channels; regulate FB to TRKSS voltage <1V; 2.4µA internal pull-up enables simple RC ramp. |
| RUN3, RUN4 | LV Channel Enable | Logic inputs enabling Channels 3 and 4; support power sequencing; threshold 0.72V typical; require clean, noise-free signals. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-channel integration with independent PVIN pins | Enables flexible multi-rail architectures-e.g., HV channels powered from battery, LV channels from intermediate 3.3V rail-without cross-coupling or shared input constraints. |
| 2-phase interleaved clocking (Ch1/Ch3 vs. Ch2/Ch4) | Reduces peak input ripple current by ~50% and doubles ripple frequency, allowing smaller input bulk capacitance and easing EMI filter design. |
| Burst Mode® with 30µA quiescent current | Maintains ultra-low standby power across all four outputs while keeping output ripple <15mVPP, critical for always-on automotive modules. |
| Configurable power-on reset with external capacitor | CPOR pin supports precise, temperature-stable reset timing (31–39.4ms typ with 1nF); eliminates need for external POR IC in space-constrained designs. |
| Per-channel power-good monitoring (PG1–PG4) | Provides individual fault detection for each output rail; simplifies system-level health monitoring and enables graceful shutdown sequences. |
Applications
| Automotive Infotainment Head Unit | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powering SoC core (1.2V), memory interface (1.8V), display controller (3.3V), and USB PHY (5V) from 12V vehicle battery with strict EMI and thermal requirements. IC Role / Device Role / Timing Role: Single-chip quad-buck regulator delivering four isolated, sequenced, and monitored DC rails; 2-phase clocking minimizes conducted emissions on shared input bus. Use Value: Eliminates four discrete DC/DC converters, reducing BOM count by >12 components and PCB area by ~35%, while meeting CISPR 25 Class 5 radiated emission limits. |
Use Scenario: Generating 5V (microcontroller), 3.3V (communication interfaces), 1.8V (ADC/DAC), and 1.2V (FPGA core) from 24V industrial supply with brown-out resilience and watchdog coordination. IC Role / Device Role / Timing Role: Centralized power manager with programmable POR delay (via CPOR) and per-rail PG outputs, enabling synchronized startup and fault-isolation across modular I/O cards. Use Value: Guarantees deterministic power sequencing (e.g., 1.2V before 1.8V) and immediate rail-failure detection, reducing system-level debug time during field deployment. |
| Medical Point-of-Care Monitor | Test & Measurement Equipment |
Use Scenario: Supplying low-noise analog front-end (1.8V), digital processing unit (1.2V), touchscreen controller (3.3V), and backlight driver (5V) from isolated 12V DC-DC converter. IC Role / Device Role / Timing Role: Multi-output regulator with Burst Mode® operation maintaining <15mVPP output ripple at microamp loads, preserving signal integrity in sensitive analog measurement paths. Use Value: Achieves >90dB PSRR at 100kHz for analog rails without additional LDO post-regulation, simplifying thermal design and improving ADC effective resolution. |
Use Scenario: Providing precision rails for high-speed DACs (1.2V), FPGA configuration (1.8V), serial transceivers (3.3V), and analog bias (5V) from lab-grade 28V bench supply. IC Role / Device Role / Timing Role: Quad-buck with independent PVIN pins allows separate filtering of HV and LV inputs, isolating noisy digital switching noise from sensitive analog supplies. Use Value: Enables >70dB CMRR on differential analog inputs by eliminating shared input impedance coupling between digital and analog power domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8603IUFD#PBF | Triple-channel (2×HV + 1×LV), 32-lead 5mm × 6mm QFN; no CPOR/POREN; no RST output; lacks Channel 4 and POR functionality. | Suitable only for 3-rail systems; cannot replace LT8602ILXE#PBF in 4-rail or POR-dependent designs. | Select only if fourth output and hardware reset timing are unnecessary; requires PCB redesign due to different pin count and package. |
| MPQ4482GL-AEC1-Z | Dual-channel (2×HV), 20-lead 3mm × 4mm QFN; no LV channels; no integrated POR; max 2A per channel; 3.5–36V input. | Requires two additional regulators for full 4-rail implementation; no power-good or reset signaling; AEC-Q100 qualified but functionally incomplete. | Use only in cost-sensitive automotive applications where only two high-current rails are needed and external sequencing/POR is acceptable. |
Compared with LT8603IUFD#PBF and MPQ4482GL-AEC1-Z, the LT8602ILXE#PBF uniquely delivers four fully independent, POR-enabled, and power-good-monitored outputs in a single package-enabling true single-chip quad-rail power management without external support circuitry.
Availability
LT8602ILXE#PBF is available at Aetrix Electronics and suitable for automotive infotainment head units, industrial PLC I/O modules, and medical point-of-care monitors requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant alternatives.
Supply support for LT8602ILXE#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 power management semiconductors, serving automotive, industrial, communications, and healthcare markets with robust, precision-engineered ICs.
The LT8602 product line delivers highly integrated, multi-output synchronous buck regulators targeting space-constrained, thermally demanding applications where reliability, low IQ, and deterministic power sequencing are critical.
FAQ
What is the operating temperature range for the LT8602ILXE#PBF?
The LT8602ILXE#PBF is rated for –40°C to 125°C junction temperature. This I-grade specification ensures reliable operation in under-hood automotive environments and industrial enclosures without derating, supported by internal thermal shutdown that activates above 150°C.
How does the LT8602ILXE#PBF achieve low quiescent current in Burst Mode®?
The LT8602ILXE#PBF achieves 30µA total quiescent current (all four channels active) by disabling non-essential internal circuitry-including error amplifiers, comparators, and gate drivers-between switching cycles while retaining regulation accuracy and <15mVPP output ripple through precise burst timing control.
Can the LT8602ILXE#PBF synchronize to an external clock, and how is it configured?
Yes, the LT8602ILXE#PBF synchronizes to an external clock via the SYNC pin (Pin 38). When driven with a logic-level square wave between 0.25MHz and 2.2MHz, the internal oscillator locks to the external frequency. If synchronization is unused, tie SYNC to GND for Burst Mode® or to a logic high for pulse-skipping operation.
What is the purpose of the TRKSS1 and TRKSS2 pins on the LT8602ILXE#PBF?
TRKSS1 and TRKSS2 provide track/soft-start control for Channels 1 and 2. When voltage on TRKSSx is below 1V, the corresponding regulator regulates its FB pin to the TRKSS voltage instead of the internal 1V reference-enabling controlled voltage ramp-up or tracking of another supply, with a 2.4µA internal pull-up supporting simple RC networks.
How is power-on reset timing configured on the LT8602ILXE#PBF?
Power-on reset timing on the LT8602ILXE#PBF is set by an external capacitor on CPOR (Pin 36), with a 2µA internal pull-up current. For example, a 1nF capacitor yields a typical POR delay of 35.2ms. The POREN pin (Pin 47) enables the timer, and RST (Pin 37) asserts low until timeout completes-providing a hardware reset signal for downstream logic.
LT8602ILXE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-LQFP Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 4
- Voltage - Input (Min):
- 2.6V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.8V, 1V
- Voltage - Output (Max):
- 42V
- Current - Output:
- 1.5A, 1.8A, 2.5A
- Frequency - Switching:
- 250kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-eLQFP (7x7)
LT8602ILXE#PBF FAQ
1.How can I place an order for LT8602ILXE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8602ILXE#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 LT8602ILXE#PBF reliable?
The price and inventory of LT8602ILXE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8602ILXE#PBF is usually 5 days.
3.What payment methods are accepted for LT8602ILXE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8602ILXE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8602ILXE#PBF?
LT8602ILXE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8602ILXE#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 LT8602ILXE#PBF?
For technical support, including LT8602ILXE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8602ILXE#PBF requirements.
6.How does Aetrix verify that LT8602ILXE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8602ILXE#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 LT8602ILXE#PBF meets industry standards.
7.What is the process for return or replacement of LT8602ILXE#PBF?
All LT8602ILXE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8602ILXE#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 LT8602ILXE#PBF part is unused and in its original packaging.
Return procedure for LT8602ILXE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT8602ILXE#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…
