My Inquiry
My Account
Analog Devices Inc. LT3593EDC#TRMPBF
- Part No.:
- LT3593EDC#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LT3593EDC#TRMPBF.pdf
- Description:
- IC LED DRIVER RGLTR 45MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:965
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3593EDC#TRMPBF from Analog Devices (formerly Linear Technology) is a 1MHz step-up DC/DC converter IC designed to drive up to ten white LEDs in series from a 2.7V–5.5V Li-Ion supply. It features high-side LED current sensing, output disconnect during shutdown, and one-pin programmable LED current control via internal 5-bit DAC. Used in portable displays requiring precise brightness control and low-noise operation.
For engineers reviewing the LT3593EDC#TRMPBF datasheet, LT3593EDC#TRMPBF pinout, LT3593EDC#TRMPBF application, or LT3593EDC#TRMPBF equivalent, key selection criteria include ±5% full-scale LED current accuracy, 32-step linear dimming (625μA–20mA), 3μA shutdown current, 1MHz fixed-frequency switching, and compatibility with 2mm × 2mm DFN packaging for space-constrained handheld designs.
Technical Context
The LT3593EDC#TRMPBF employs constant-frequency current-mode boost topology with internal power switch and high-side current sense amplifier, enabling ground-referenced LED string configuration. Its 1MHz switching frequency minimizes external component size while maintaining low input ripple and small 1μF output capacitor requirement.
LED current is programmed via digital strobing of the CTRL pin, which decrements an internal 5-bit counter to set output between 625μA and 20mA in 625μA steps. Shutdown is triggered by holding CTRL low >128μs, simultaneously disconnecting the LED string from CAP via internal switch and reducing quiescent current to 3μA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.7V to 5.5V - supports single-cell Li-Ion and 3.3V logic rails without level-shifting. |
| Switching Frequency | 1MHz (±15%) - enables use of tiny 10μH inductors and 1μF ceramic capacitors. |
| Full-Scale LED Current | 20mA ±5% - ensures consistent brightness across temperature and unit-to-unit variation. |
| LED Current Resolution | 625μA linear steps - provides 32 discrete brightness levels for smooth PWM-free dimming. |
| Shutdown Current | 3μA - minimizes battery drain in standby mode for portable devices. |
| Output Disconnect | Active during shutdown - prevents leakage current through open LED strings and eliminates need for external blocking FET. |
| Overvoltage Protection | Clamps at 38V - protects downstream components if LED string opens or fails. |
Pinout & Package
LT3593EDC#TRMPBF is housed in a 6-lead DFN package (2mm × 2mm × 0.75mm) with exposed thermal pad (Pin 7) that must be soldered to PCB ground for thermal and electrical performance. Pin numbering follows top-view orientation with Pin 1 marked by chamfer or bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CTRL (Pin 3) | Current programming & shutdown control | Rising-edge strobed to decrement internal 5-bit DAC; held low >128μs initiates shutdown with LED disconnect. |
| GND (Pin 2) | Power and signal reference ground | Primary return path for VIN, SW, CAP, LED, and CTRL; connects to exposed pad (Pin 7) for thermal conduction. |
| VIN (Pin 1) | Main input supply | Connects to 2.7V–5.5V source; requires local 1μF X5R/X7R ceramic bypass capacitor. |
| LED (Pin 4) | High-side LED string connection | Internally switched to CAP during operation; disconnected in shutdown to isolate LED string from output. |
| CAP (Pin 5) | Boost output node | Connects to 1μF output capacitor and cathode of external Schottky diode; senses LED current via internal high-side sense. |
| SW (Pin 6) | Internal power switch drain | Connects to inductor; switches at 1MHz to generate boosted voltage; requires short, low-inductance trace to minimize EMI. |
Key Features
| Feature | Design Value |
|---|---|
| One-pin LED current programming | CTRL pin accepts digital strobes to select any of 32 linear current levels (625μA–20mA) without external resistors or I²C interface. |
| Output disconnect in shutdown | Internal switch isolates LED string from CAP node, eliminating dark-current leakage and enabling true zero-power LED off-state. |
| High-side current sensing | Allows LED cathode to remain grounded-simplifies PCB layout, avoids floating ground issues, and enables direct integration with touch-screen or display controllers. |
| 1MHz fixed-frequency operation | Reduces EMI filtering requirements and allows use of miniature 10μH inductors and 1μF ceramic capacitors for ultra-compact footprint. |
| Open-LED protection | Internal clamp limits CAP voltage to 38V and reduces switching frequency to limit input current during LED string failure or disconnection. |
Applications
| Cell Phones | Digital Cameras |
|---|---|
Use Scenario: Backlighting for 2.4"–3.5" AMOLED or TFT LCD displays in smartphones with single Li-Ion cell power. IC Role / Device Role / Timing Role: Constant-current LED driver providing regulated 15–20mA per string with 32-step linear dimming controlled via baseband processor GPIO. Use Value: Enables flicker-free, low-noise display backlight without external PWM circuitry or current-setting resistors-reducing BOM count and board area. |
Use Scenario: Flash illumination for 5MP–12MP camera modules in compact handheld devices. IC Role / Device Role / Timing Role: High-efficiency boost converter driving 4–6 white LEDs in series at 20mA with fast enable/disable response (<200μs). Use Value: Delivers consistent flash intensity across battery voltage range (3.0V–4.2V) while maintaining <3μA shutdown current to preserve standby battery life. |
| PDA / Handheld Computers | GPS Receivers |
Use Scenario: Keypad and main display backlighting in industrial PDAs operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Temperature-stable LED driver with ±5% current accuracy over full junction range and integrated open-LED fault detection. Use Value: Eliminates brightness drift during thermal cycling and provides fail-safe shutdown on LED open-circuit-critical for ruggedized field equipment. |
Use Scenario: Status indicator and map backlighting in automotive-grade GPS navigation units powered from 3.3V system rail. IC Role / Device Role / Timing Role: Low-noise, 1MHz-switching LED driver minimizing RF interference with GPS L1-band (1.575GHz) reception. Use Value: Achieves >80% efficiency at 10mA load with minimal conducted EMI-no additional shielding or filtering required near sensitive RF front-end. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED boost driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3591EDC#TRMPBF | Includes integrated Schottky diode; wider VIN range (2.5V–12V); higher max LED current (30mA); no output disconnect in shutdown. | Eliminates external diode but lacks LED string isolation-unsuitable where true zero-leakage off-state is required. | Select LT3591EDC#TRMPBF only when board space is extremely constrained and external diode omission outweighs need for shutdown disconnect. |
| LT3465AEDC#TRMPBF | 1.2MHz switching; integrated Schottky; 6-LED max; 1.9mA quiescent current; no CTRL-based dimming-requires analog or PWM control. | Designed for lower LED count and simpler control schemes; lacks 32-step linear programming and open-LED clamp. | Choose LT3465AEDC#TRMPBF for cost-sensitive 3–6 LED applications where GPIO-controlled dimming is not needed and external diode integration is preferred. |
Compared with LT3593EDC#TRMPBF, LT3591EDC#TRMPBF trades output disconnect and precision CTRL programming for integrated diode and higher current capability, while LT3465AEDC#TRMPBF sacrifices programmability and protection features for lower quiescent current and simpler analog/PWM interface-making LT3593EDC#TRMPBF optimal for high-reliability, multi-LED portable displays requiring zero-leakage shutdown and fine-grained brightness control.
Availability
LT3593EDC#TRMPBF is available at Aetrix Electronics and suitable for cell phones, digital cameras, PDAs, handheld computers, and GPS receivers requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for LT3593EDC#TRMPBF 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 its legacy of high-performance analog, power management, and signal conditioning ICs for demanding industrial, automotive, and portable applications.
The LT3593EDC#TRMPBF belongs to Linear's white LED boost driver product line, engineered specifically for space-constrained, battery-powered displays requiring high efficiency, precise current regulation, and robust fault protection without external passive components.
FAQ
What is the maximum number of white LEDs the LT3593EDC#TRMPBF can drive?
The LT3593EDC#TRMPBF is specified to drive up to ten white LEDs in series from a 3.6V input, assuming typical forward voltage of 3.2V per LED (32V total). Its 38V overvoltage clamp and internal switch rating support this configuration while maintaining regulation and protection. The LT3593EDC#TRMPBF achieves this using high-side current sensing and a 1MHz boost architecture optimized for low-component-count portable lighting.
How does the CTRL pin function for LED current programming on the LT3593EDC#TRMPBF?
The CTRL pin on the LT3593EDC#TRMPBF accepts rising-edge pulses to decrement an internal 5-bit counter, setting LED current in 625μA steps from 20mA down to 625μA. After the final pulse, the LT3593EDC#TRMPBF waits 128μs before updating the output. Holding CTRL low >128μs forces shutdown with LED disconnect. This eliminates need for external DACs or resistors while enabling firmware-controlled brightness tuning.
Does the LT3593EDC#TRMPBF provide output disconnect during shutdown?
Yes-the LT3593EDC#TRMPBF includes an internal switch between the CAP and LED pins that opens during shutdown, fully isolating the LED string from the boost output. This ensures zero leakage current through the LEDs, critical for battery-powered devices requiring true off-state power savings. The LT3593EDC#TRMPBF achieves this without external MOSFETs or complex sequencing logic.
What package type is used for the LT3593EDC#TRMPBF?
The LT3593EDC#TRMPBF uses a 6-lead plastic DFN package measuring 2mm × 2mm × 0.75mm with an exposed thermal pad (Pin 7) that must be soldered to PCB ground. This compact, low-profile package supports high-density portable layouts and efficient thermal dissipation. The LT3593EDC#TRMPBF's DFN footprint is distinct from the TSOT-23 variant (LT3593ES6#TRMPBF) and requires dedicated land pattern per LTC DWG #05-08-1703.
What is the typical efficiency of the LT3593EDC#TRMPBF when driving ten white LEDs?
At VIN = 3.6V and 20mA LED current, the LT3593EDC#TRMPBF delivers approximately 85% peak efficiency when driving ten white LEDs, as shown in Figure TA01b of the datasheet. Efficiency remains above 80% across 5–20mA load range due to low RDS(ON) switch (250mV at 250mA), 1MHz fixed-frequency operation minimizing core losses, and optimized gate drive. The LT3593EDC#TRMPBF sustains this performance with only 1μF input and output capacitors.
LT3593EDC#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 45mA
- Frequency:
- 1MHz
- Dimming:
- -
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x2)
LT3593EDC#TRMPBF FAQ
1.How can I place an order for LT3593EDC#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3593EDC#TRMPBF 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 LT3593EDC#TRMPBF reliable?
The price and inventory of LT3593EDC#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3593EDC#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT3593EDC#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3593EDC#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3593EDC#TRMPBF?
LT3593EDC#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3593EDC#TRMPBF 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 LT3593EDC#TRMPBF?
For technical support, including LT3593EDC#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3593EDC#TRMPBF requirements.
6.How does Aetrix verify that LT3593EDC#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT3593EDC#TRMPBF 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 LT3593EDC#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT3593EDC#TRMPBF?
All LT3593EDC#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3593EDC#TRMPBF, 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 LT3593EDC#TRMPBF part is unused and in its original packaging.
Return procedure for LT3593EDC#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3593EDC#TRMPBF Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
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…
