My Inquiry
My Account
Analog Devices Inc. LT8415IDDB#TRPBF
- Part No.:
- LT8415IDDB#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LT8415IDDB#TRPBF.pdf
- Description:
- IC REG BOOST ADJ 20MA 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,337
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT8415IDDB#TRPBF from Analog Devices (formerly Linear Technology) is an ultralow-power boost converter IC with dual integrated complementary MOSFET half-bridges (N- and P-channel), on-chip Schottky diode, output disconnect PMOS, and 12.4MΩ/0.4MΩ internal feedback divider. It delivers up to 34V output from 2.5V–16V input, achieves 10.5μA quiescent current in active mode, and supports 0μA shutdown current - ideal for sensor biasing and liquid lens driver circuits.
For engineers reviewing the LT8415IDDB#TRPBF datasheet, LT8415IDDB#TRPBF pinout, LT8415IDDB#TRPBF application, or LT8415IDDB#TRPBF equivalent, key selection criteria include its dual half-bridge timing control, integrated output disconnect, 1.235V reference voltage with <±0.015V variation over temperature, and guaranteed operation across –40°C to 125°C junction range.
Technical Context
The LT8415IDDB#TRPBF employs a variable peak inductor current and variable off-time control scheme to maintain regulation across wide load ranges while minimizing output voltage ripple and maximizing efficiency. Its internal error amplifier compares FBP voltage (set by external resistor divider from VREF or direct bias) against a precise 1.235V reference to servo VOUT.
Each half-bridge (IN1/OUT1 and IN2/OUT2) operates synchronously under single-pin logic control with shoot-through prevention; the integrated PMOS disconnect switch blocks VOUT from CAP during shutdown, limiting fault current to ≤19mA. The SHDN pin includes a built-in comparator with 1.30V threshold and 60mV hysteresis for robust enable/disable sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 16V - supports wide battery and industrial supply rails without external LDO pre-regulation. |
| Output Voltage Range | Up to 40V (clamped) - enables driving high-voltage capacitive loads like RF MEMS relays and liquid lenses. |
| Quiescent Current | 10.5μA typical in active mode - extends battery life in always-on sensor nodes and portable medical devices. |
| Reference Voltage (VREF) | 1.235V ±15mV over –40°C to 125°C - provides stable feedback for accurate output voltage setting via FBP divider. |
| Half-Bridge Rise/Fall Time | 2.5μs rise / 3μs fall (34V, 200pF load) - ensures fast switching for time-critical actuator control with minimal delay. |
| Shutdown Current | 0μA typical - eliminates standby power draw in energy-harvesting and ultra-low-power IoT endpoints. |
| Internal Feedback Divider Ratio | 31.85:1 (12.4MΩ/0.4MΩ) - reduces input-referred quiescent current and simplifies external resistor network design. |
Pinout & Package
LT8415IDDB#TRPBF is housed in a 12-pin 3mm × 2mm plastic DFN package with exposed thermal pad (Pin 13 = GND). The package supports high-density PCB layouts and requires soldering of the exposed pad for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SHDN (Pin 1) | Enable/Disable control input | Comparator-based shutdown pin with 1.30V threshold and 60mV hysteresis; drives 0μA in shutdown. |
| VCC (Pin 2) | Main power supply input | Accepts 2.5V–16V; must be locally bypassed to GND for stable regulator operation and EMI reduction. |
| GND (Pins 3 & 13) | Ground reference and thermal path | Pin 13 is exposed pad - mandatory solder connection to PCB ground plane for thermal dissipation and noise immunity. |
| SW (Pin 4) | Switch node | Collector of internal NPN power switch; high dv/dt node requiring minimized trace area to suppress EMI. |
| IN1 / IN2 (Pins 5 & 6) | Half-bridge logic inputs | CMOS-compatible inputs controlling OUT1/OUT2 polarity; avoid 0.3V–1.0V region to prevent shoot-through. |
| OUT1 / OUT2 (Pins 7 & 8) | Half-bridge outputs | Drive external capacitive loads between VOUT and GND; support 34V/0V swing with 2.5μs rise time. |
| VOUT (Pin 9) | Output disconnect drain | Drain of integrated PMOS disconnect switch; blocks output during shutdown with ≤50mV drop at 1mA. |
| CAP (Pin 10) | Schottky cathode | Cathode of internal Schottky diode; requires local 0.1μF ceramic capacitor for inductor current filtering. |
| VREF (Pin 11) | Precision reference output | 1.235V source with 10μA current limit; used to set FBP voltage via resistor divider for output programming. |
| FBP (Pin 12) | Error amplifier positive input | Sets regulated VOUT = 31.85 × VFBP; accepts external reference or resistor divider from VREF. |
Key Features
| Feature | Design Value |
|---|---|
| Dual synchronous half-bridges | IN1/OUT1 and IN2/OUT2 pairs provide independent 34V/0V drive capability with shoot-through protection and <4μs total propagation delay. |
| Integrated output disconnect | PMOS switch isolates VOUT from CAP during shutdown, enabling true zero-load leakage and safe hot-swap operation. |
| Ultralow quiescent current architecture | 10.5μA active current + 0μA shutdown achieved via high-value internal feedback resistors and optimized bias networks. |
| Programmable soft-start | VREF pin supports optional 47nF–220nF capacitor to control output ramp rate and limit inrush current during startup. |
| Overvoltage protection | Hardware clamping limits CAP, VOUT, OUT1, and OUT2 to ≤40V - prevents damage from transient overvoltage events. |
Applications
| Sensor Power | RF MEMS Relay Power |
|---|---|
|
Use Scenario: Biasing low-current analog sensors (e.g., piezoresistive pressure sensors, MEMS accelerometers) in battery-powered condition monitoring systems. IC Role / Device Role / Timing Role: Provides stable, low-noise 5V–15V bias voltage with <10.5μA idle draw; half-bridges unused or tied low. Use Value: Extends multi-year battery life while maintaining sensor accuracy through tight line/load regulation (±0.2% typical). |
Use Scenario: Driving RF MEMS relay control electrodes requiring fast 0V/30V transitions and sub-microsecond timing precision. IC Role / Device Role / Timing Role: Acts as dual high-voltage gate driver with matched rise/fall times (2.5μs/3μs) and <4μs delay skew between OUT1/OUT2. Use Value: Enables reliable RF switching with no shoot-through risk due to synchronous half-bridge control and integrated dead-time management. |
| Liquid Lens Driver | Low-Power Actuator Bias/Control |
|
Use Scenario: Controlling electrowetting-based liquid lenses in compact endoscopic or AR/VR optics where space and power are constrained. IC Role / Device Role / Timing Role: Generates precise 34V/0V square-wave drive signals across two independent channels (OUT1/OUT2) synchronized to image frame timing. Use Value: Delivers full 34V swing into 1nF–200pF capacitive loads with <5μs total transition time, enabling sub-millisecond focus adjustment. |
Use Scenario: Providing programmable bias voltage and polarity control for electroactive polymer (EAP) actuators in wearable haptics or microfluidic valves. IC Role / Device Role / Timing Role: Functions as dual-polarity, digitally controlled high-voltage source using IN1/IN2 logic inputs and VREF-based output scaling. Use Value: Supports closed-loop actuator control with 31.85× gain accuracy and <±0.5% output voltage drift over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter with integrated half-bridge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3463AEDD#TRPBF | Dual boost/inverter with 250mA switch current limit; no integrated half-bridges or output disconnect; 40μA quiescent current. | Supports ±40V dual-rail outputs but lacks synchronous half-bridge timing control and VOUT-to-CAP isolation. | Select when bipolar output and inverting topology are required, not for unidirectional high-voltage capacitive drive. |
| LT1945EDD#TRPBF | Dual-output boost/inverter with 350mA switch current; 40μA IQ; no integrated Schottky or output disconnect; 10-lead MSOP package. | Offers higher output current but lacks half-bridge outputs, integrated feedback dividers, and shutdown isolation capability. | Prefer for higher-power dual-rail biasing where 34V/0V timing synchronization and zero-leakage shutdown are not critical. |
Compared with LT3463AEDD#TRPBF and LT1945EDD#TRPBF, the LT8415IDDB#TRPBF uniquely integrates dual half-bridges with shoot-through protection, 0μA shutdown, and output disconnect - making it the only choice for low-power, high-timing-precision capacitive load driving where leakage and startup surge must be eliminated.
Availability
LT8415IDDB#TRPBF is available at Aetrix Electronics and suitable for sensor power, RF MEMS relay control, liquid lens driver, and low-power actuator bias applications requiring stable component supply, extended temperature operation (–40°C to 125°C), and long-term lifecycle continuity.
Supply support for LT8415IDDB#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT8415 product line was designed specifically for ultralow-power, high-voltage capacitive load driving in space-constrained portable and implantable systems - emphasizing quiescent current minimization, integrated protection, and precise timing control.
FAQ
What is the maximum output voltage supported by the LT8415IDDB#TRPBF?
The LT8415IDDB#TRPBF supports a maximum regulated output voltage of 40V, enforced by internal overvoltage protection circuitry on the CAP, VOUT, OUT1, and OUT2 pins. Even if the FBP pin voltage is driven above the reference, VOUT will clamp at 40V to prevent device damage or external component overstress. This hard limit applies across the full –40°C to 125°C operating temperature range.
How does the LT8415IDDB#TRPBF achieve 0μA shutdown current?
The LT8415IDDB#TRPBF achieves 0μA shutdown current by fully disabling all internal bias networks and disconnecting the VREF and FBP circuits when SHDN is pulled below 0.3V. Internal power switches isolate the VCC rail from core logic, and the integrated output disconnect PMOS blocks current flow from CAP to VOUT. Measured shutdown current is typically 0μA with a maximum of 1μA over temperature.
Can the LT8415IDDB#TRPBF drive asymmetric capacitive loads on OUT1 and OUT2 simultaneously?
Yes, the LT8415IDDB#TRPBF supports independent drive of asymmetric capacitive loads on OUT1 and OUT2. Each half-bridge has matched timing characteristics (2.5μs rise, 3μs fall, <4μs delay skew), and the internal gate drivers are isolated per channel. Load mismatch up to 10:1 (e.g., 200pF on OUT1, 2nF on OUT2) maintains timing integrity without external compensation, as confirmed in Typical Application TA02 waveforms.
What is the purpose of the high-value (12.4MΩ/0.4MΩ) internal feedback resistor divider in the LT8415IDDB#TRPBF?
The 12.4MΩ/0.4MΩ internal feedback divider in the LT8415IDDB#TRPBF reduces input-referred quiescent current by minimizing current draw from the VOUT node - critical for battery-powered systems. It sets the nominal FBP-to-VOUT ratio at 31.85:1, allowing accurate output voltage programming (VOUT = 31.85 × VFBP) while eliminating two external high-precision resistors and associated board space.
Does the LT8415IDDB#TRPBF require an external Schottky diode?
No, the LT8415IDDB#TRPBF integrates a Schottky diode with 650mV forward voltage at 10mA and <0.5μA reverse leakage at 40V reverse bias. The diode's cathode is accessible at the CAP pin, and its anode connects internally to the SW node. External diodes are unnecessary unless higher current (>25mA) or lower VF is required - which would compromise the IC's ultralow-IQ advantage.
LT8415IDDB#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 1.235V
- Voltage - Output (Max):
- 40V
- Current - Output:
- 20mA (Switch)
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DFN (3x2)
LT8415IDDB#TRPBF FAQ
1.How can I place an order for LT8415IDDB#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8415IDDB#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 LT8415IDDB#TRPBF reliable?
The price and inventory of LT8415IDDB#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8415IDDB#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8415IDDB#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8415IDDB#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8415IDDB#TRPBF?
LT8415IDDB#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8415IDDB#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 LT8415IDDB#TRPBF?
For technical support, including LT8415IDDB#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8415IDDB#TRPBF requirements.
6.How does Aetrix verify that LT8415IDDB#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8415IDDB#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 LT8415IDDB#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8415IDDB#TRPBF?
All LT8415IDDB#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8415IDDB#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 LT8415IDDB#TRPBF part is unused and in its original packaging.
Return procedure for LT8415IDDB#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT8415IDDB#TRPBF 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…
