My Inquiry
My Account
Analog Devices Inc. LT1615ES5#TRPBF
- Part No.:
- LT1615ES5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LT1615ES5#TRPBF.pdf
- Description:
- IC REG BOOST SEPIC ADJ TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:6,596
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1615ES5#TRPBF from Analog Devices (formerly Linear Technology) is a micropower step-up DC/DC converter in a 5-lead ThinSOT™ package, featuring 350mA switch current limit, 1.2V–15V input range, and 34V max output voltage. It delivers high efficiency in space-constrained portable systems such as LCD bias supplies and handheld computers using fixed off-time control and a 250mV VCE(SAT) NPN switch.
For engineers reviewing the LT1615ES5#TRPBF datasheet, LT1615ES5#TRPBF pinout, LT1615ES5#TRPBF application, or LT1615ES5#TRPBF equivalent, key selection criteria include quiescent current (20µA active / 0.5µA shutdown), FB reference voltage (1.23V), switch off-time (400ns), and compatibility with low-profile 4.7µH–10µH inductors and ceramic output capacitors.
Technical Context
The LT1615ES5#TRPBF implements a constant off-time, hysteretic control architecture with internal bandgap reference and comparator-based feedback. Its 400ns minimum off-time enables high-frequency operation with small passive components, while the 350mA current-limited NPN switch supports boost topologies up to 34V without transformers.
Operation relies on FB pin voltage hysteresis (8mV) and dynamic current limiting: under start-up or short-circuit, off-time extends to 1.5µs and current limit reduces to ~250mA. The device integrates protection circuitry and requires no external compensation, simplifying design for battery-powered 1.2V–15V input systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.2V to 15V - supports single- and multi-cell alkaline/NiMH and Li-ion sources |
| Switch Current Limit | 350mA - sets maximum inductor ramp current and defines peak load capability |
| Quiescent Current | 20µA - enables >1000-hour battery life in always-on low-power monitoring circuits |
| FB Reference Voltage | 1.23V ±25mV - determines output voltage via external resistor divider (VOUT = 1.23 × (1 + R1/R2)) |
| Switch Off-Time | 400ns - enables use of sub-10µH inductors and minimizes board footprint |
| VCE(SAT) | 250mV at 300mA - reduces conduction loss and improves efficiency at medium loads |
| Max Output Voltage | 34V - supports LCD bias, PIN diode drivers, and dual-rail ±20V converters |
Pinout & Package
LT1615ES5#TRPBF uses a 5-lead ThinSOT™ (SOT-23 variant) package: 1mm height, 2.8mm × 1.6mm footprint, JEDEC MO-193 compliant. Pin 1 (SW) connects to the collector of the internal NPN switch; Pin 2 (GND) requires direct local ground plane tie; Pin 3 (FB) senses output via resistive divider; Pin 4 (SHDN) enables/disables with logic-level thresholds (≥0.9V / ≤0.25V); Pin 5 (VIN) must be bypassed with ≥4.7µF ceramic capacitor.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch Collector | Drives external inductor; minimize trace area to reduce EMI radiation |
| GND (Pin 2) | Power Ground | Reference node for all internal circuitry; connect directly to low-impedance ground plane |
| FB (Pin 3) | Feedback Input | Senses divided output voltage; 30nA bias current enables high-resistor-divider designs |
| SHDN (Pin 4) | Enable Control | Logic-compatible input: <0.25V disables (0.5µA shutdown current), ≥0.9V enables |
| VIN (Pin 5) | Input Supply | Accepts 1.2V–15V; requires local 4.7µF ceramic decoupling for stable switching |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 20µA quiescent current enables multi-year battery life in remote sensors and backup systems |
| Ultra-Low Shutdown Current | 0.5µA shutdown draw preserves primary cell energy during extended standby |
| High-Voltage Switch | 36V-rated SW pin supports 34V outputs without transformer or cascaded stages |
| Fixed Off-Time Control | 400ns minimum off-time allows use of tiny 4.7µH inductors and reduces solution size by >40% |
| Integrated Hysteretic Regulation | 8mV FB hysteresis eliminates need for external compensation and simplifies layout |
Applications
| LCD Bias Supply | Handheld Computer Power |
|---|---|
Use Scenario: Generating 20V from 2.5V–4.2V Li-ion battery for TFT-LCD panel gate drivers. IC Role / Device Role / Timing Role: Primary boost regulator with fixed off-time control and 1.23V feedback reference. Use Value: Enables compact, transformerless 20V rail with >75% efficiency across 1–12mA load range. | Use Scenario: Providing 3.3V from 1.5V–3V alkaline/NiMH source in portable data terminals. IC Role / Device Role / Timing Role: Step-up converter operating in burst mode at light loads to maintain ultra-low power draw. Use Value: Delivers 60mA at 3.3V with 20µA quiescent current, extending AA battery life beyond 500 hours. |
| Battery Backup System | Dual-Rail ±20V Converter |
Use Scenario: Maintaining 5V system rail during main supply interruption using 3.6V Li-SOCl₂ backup cell. IC Role / Device Role / Timing Role: Standby boost converter activated only when primary supply drops below threshold. Use Value: Draws just 0.5µA in shutdown, preserving 10+ year shelf life of primary lithium backup cells. | Use Scenario: Generating isolated ±20V rails for analog front-end instrumentation from 1.5V–5V input. IC Role / Device Role / Timing Role: Core switcher in charge-pump-assisted dual-output topology with output disconnect. Use Value: Achieves ±20V at 4mA per rail using single inductor and four Schottky diodes-no transformer required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1615IS5#TRPBF | Wider –40°C to +85°C temperature grade; identical electrical specs and pinout | Required for industrial/outdoor deployments where ambient exceeds 70°C | Select LT1615IS5#TRPBF when full industrial temp range is mandated; otherwise LT1615ES5#TRPBF suffices for commercial environments. |
| LT1317CS8#TRPBF | 600kHz fixed-frequency PWM (vs. hysteretic); 200mA current limit; MSOP-8 package | Better ripple/noise performance but higher quiescent current (120µA) and larger footprint | Choose LT1317CS8#TRPBF only if EMI-sensitive audio or RF circuits demand fixed-frequency operation and size is secondary. |
Compared with LT1615IS5#TRPBF, the LT1615ES5#TRPBF offers identical functionality at lower cost and is sufficient for 0°C–70°C applications; versus LT1317CS8#TRPBF, it trades fixed frequency for lower IQ and smaller size-critical for battery longevity and portable form factors.
Availability
LT1615ES5#TRPBF is available at Aetrix Electronics and suitable for LCD bias supplies, handheld computer power management, and battery backup systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LT1615ES5#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 and maintains its precision analog and power management portfolio. Linear pioneered high-efficiency micropower DC/DC conversion for portable electronics.
The LT1615ES5#TRPBF belongs to Linear's ThinSOT™ micropower boost converter family, designed specifically for space- and energy-constrained applications including LCD bias, sensor nodes, and backup power where ultra-low IQ and minimal footprint are essential.
FAQ
What is the minimum input voltage supported by the LT1615ES5#TRPBF?
The LT1615ES5#TRPBF supports a minimum input voltage of 1.2V, enabling operation directly from partially discharged single-cell alkaline, NiMH, or Li-ion batteries. This specification is guaranteed over the commercial temperature range (0°C to 70°C); the LT1615-1 variant extends down to 1.0V for ultra-low-voltage applications. Below 1.2V, regulation is not assured, and startup may fail.
How does the LT1615ES5#TRPBF achieve high efficiency at light loads?
The LT1615ES5#TRPBF achieves high light-load efficiency through its hysteretic, constant off-time control scheme and ultra-low 20µA quiescent current. Unlike fixed-frequency PWM converters, it pulses only when output voltage droops below the FB hysteresis band, eliminating switching losses during idle periods. This burst-mode behavior maintains >70% efficiency even at 0.1mA load with 4.2V input.
Can the LT1615ES5#TRPBF generate negative output voltages?
Yes-the LT1615ES5#TRPBF can generate negative outputs when configured in inverting or SEPIC topology. Application Note 1615-1 shows a ±20V dual-output design using one LT1615ES5#TRPBF, four Schottky diodes, and shared inductor. For dedicated inverting operation, the LT1611 or LT1617 are optimized alternatives, but the LT1615ES5#TRPBF remains viable for custom dual-rail solutions.
What is the recommended output capacitor for the LT1615ES5#TRPBF in a 20V LCD bias application?
For a 20V LCD bias application, the LT1615ES5#TRPBF datasheet recommends a 1µF X5R/X7R multilayer ceramic capacitor (e.g., Taiyo Yuden TMK316BJ105) rated for ≥25V. Ceramic capacitors provide low ESR (<10mΩ), minimizing output ripple and avoiding the size/ESR penalties of tantalum alternatives. A 4.7pF feed-forward capacitor across the upper feedback resistor further reduces ripple by compensating loop dynamics.
Is the LT1615ES5#TRPBF pin-compatible with the LT1615-1 variants?
No-the LT1615ES5#TRPBF is not pin-compatible with LT1615-1 variants (e.g., LT1615ES5-1#TRPBF) because they differ in current limit (350mA vs. 100mA) and internal current-sense reference (42mV vs. 12mV), though both share identical pinout, package, and FB/SHDN logic thresholds. Swapping them requires verifying inductor/diode ratings and recalculating feedback resistors if output voltage changes due to different load capability.
LT1615ES5#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Boost, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1V
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 34V
- Current - Output:
- 300mA (Switch)
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
LT1615ES5#TRPBF FAQ
1.How can I place an order for LT1615ES5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1615ES5#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 LT1615ES5#TRPBF reliable?
The price and inventory of LT1615ES5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1615ES5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1615ES5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1615ES5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1615ES5#TRPBF?
LT1615ES5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1615ES5#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 LT1615ES5#TRPBF?
For technical support, including LT1615ES5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1615ES5#TRPBF requirements.
6.How does Aetrix verify that LT1615ES5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1615ES5#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 LT1615ES5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1615ES5#TRPBF?
All LT1615ES5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1615ES5#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 LT1615ES5#TRPBF part is unused and in its original packaging.
Return procedure for LT1615ES5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1615ES5#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…
