My Inquiry
My Account
Analog Devices Inc. LTC3534EDHC#TRPBF
- Part No.:
- LTC3534EDHC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3534EDHC#TRPBF.pdf
- Description:
- IC REG BUCK BST ADJ 500MA 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,045
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3534EDHC#TRPBF from Analog Devices (formerly Linear Technology) is a synchronous 4-switch buck-boost DC/DC converter IC designed for single-cell Li-ion or multi-cell alkaline/NiMH battery-powered systems where input voltage crosses the regulated output. It delivers up to 500mA at 5V from 4 AA cells (3.6–6.4V), supports 2.4V–7V input and 1.8V–7V output ranges, operates at fixed 1MHz switching frequency, and achieves up to 94% efficiency with synchronous rectification.
For engineers reviewing the LTC3534EDHC#TRPBF datasheet, LTC3534EDHC#TRPBF pinout, LTC3534EDHC#TRPBF application, or LTC3534EDHC#TRPBF equivalent, key selection criteria include its continuous conduction across VIN/VOUT crossover, Burst Mode® operation with 25µA quiescent current, programmable soft-start via RUN/SS, reverse current limit, and thermal/short-circuit protection in a thermally enhanced 16-lead DFN package.
Technical Context
The LTC3534EDHC#TRPBF implements a proprietary 4-switch buck-boost topology that enables seamless transition between buck (VIN > VOUT), buck-boost (VIN ≈ VOUT), and boost (VIN < VOUT) modes using internal PMOS/NMOS switches A–D. Its voltage-mode error amplifier drives the VC pin to control duty cycle phasing, with internal 1MHz oscillator and dual current limiting: average (1.8A typical) and peak (2.6A typical).
Burst Mode® operation disables switching during light loads to reduce quiescent current to 25µA, while fixed-frequency PWM mode ensures low-noise output. The IC integrates output disconnect in shutdown, programmable soft-start via RC on RUN/SS, and active clamp on VC during Burst Mode to minimize transient overshoot upon mode re-entry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.4V to 7V - supports 4xAA (3.6–6.4V), single Li-ion (3.0–4.2V), or USB input without external LDO pre-regulation |
| VOUT Range | 1.8V to 7V - adjustable via FB resistor divider; typical 5V output at 500mA for USB power rail generation |
| Switching Frequency | 1MHz ±15% - enables use of compact 4.7µH inductors and 22µF ceramic output capacitors |
| Quiescent Current (Burst) | 25µA typical - extends battery runtime in standby or intermittent-use portable devices |
| Efficiency | Up to 94% - achieved via synchronous rectification and low RDS(ON) switches (215–275mΩ) |
| Shutdown Current | <1µA - ensures negligible battery drain when system is powered off |
| Current Limit | 1.8A typical average, 2.6A typical peak - protects against overload and short-circuit conditions |
Pinout & Package
Package: 16-lead (5mm × 3mm × 0.75mm) plastic DFN (DHC) with exposed thermal pad (Pin 17 = PGND). Requires soldering of exposed pad and all GND pins (1, 8, 9, 16) to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (1, 3, 8, 9, 16) | Signal and substrate ground reference | Multiple dedicated GND pins ensure low-impedance return paths for analog and power sections; exposed pad (Pin 17) must be soldered as primary thermal path |
| RUN/SS (2) | Combined enable and soft-start control | Logic threshold: <0.4V = shutdown, >1.4V = enabled; RC network provides controlled VC ramp for inrush current limiting |
| PGND1, PGND2 (4, 7) | Power ground for NMOS switches B and C | Separate high-current ground returns minimize noise coupling into sensitive analog circuitry |
| SW1 (5), SW2 (6) | Internal switch node connections | Connect external inductor between SW1 and SW2; short, low-inductance traces required to suppress EMI and switching losses |
| PWM (10) | Burst Mode® select input | Low = Burst Mode enabled (25µA IQ); high = fixed-frequency PWM mode (low-noise, 1MHz) |
| VOUT (11) | Regulated output terminal | Delivers final DC output; requires local 22µF ceramic capacitor to GND for ripple suppression and transient response |
| PVIN (12) | Power input supply for gate drivers | Must be decoupled with 10µF ceramic capacitor to PGND; separates high-current PVIN path from logic VIN |
| VIN (13) | Main input supply | Connects to battery or source; supplies bias current and logic; shares PGND1/PGND2 return paths |
| VC (14) | Error amplifier output | Drives compensation network (R-C from VC to FB); clamped during soft-start and actively held during Burst Mode |
| FB (15) | Feedback voltage sense input | Monitors resistive divider from VOUT; reference voltage = 1.000V typical; sets output voltage per VOUT = 1.000 × (R1+R2)/R2 |
Key Features
| Feature | Design Value |
|---|---|
| Continuous VIN/VOUT crossover operation | Enables single-stage regulation across full battery discharge curve (e.g., 4.2V → 3.0V Li-ion while maintaining 3.3V or 5V output) |
| Synchronous 4-switch architecture | Eliminates external diodes; achieves 94% peak efficiency and supports bidirectional current flow with reverse current limit |
| Burst Mode® with 25µA IQ | Extends usable battery life in portable instruments by reducing no-load power draw by >95% vs. forced-PWM mode |
| Integrated protection suite | Includes thermal shutdown, short-circuit protection, programmable soft-start, and <1µA shutdown current for safety-critical applications |
| Thermally enhanced DFN package | θJC = 4°C/W enables high-power density designs without heatsinks; exposed pad must be soldered to PCB ground plane |
Applications
| Medical Instruments | Portable Barcode Readers |
|---|---|
Use Scenario: Handheld blood glucose meters and portable pulse oximeters operating from two AA batteries with tight space constraints. IC Role / Device Role / Timing Role: Primary power regulator generating stable 3.3V or 5V from 2.4–3.6V input, maintaining regulation as battery discharges below output voltage. Use Value: Continuous buck-boost operation eliminates need for separate boost or buck stages, reducing BOM count and PCB area while extending battery life via 25µA Burst Mode IQ. | Use Scenario: Ruggedized industrial barcode scanners powered by 4xAA cells requiring 5V USB-compatible output for camera and decoder modules. IC Role / Device Role / Timing Role: Single-inductor buck-boost converter delivering 500mA at 5V with fast load transient response for laser/LED pulsing and image capture. Use Value: 94% efficiency and 1MHz switching allow compact 4.7µH inductor + 22µF ceramic capacitor solution, meeting stringent EMI requirements for Class B digital equipment. |
| Portable Inventory Terminals | USB to 5V Supply |
Use Scenario: Warehouse handheld terminals using rechargeable NiMH packs (2.4–4.2V) needing clean 3.3V for MCU and 5V for display backlight. IC Role / Device Role / Timing Role: Dual-rail power source with output disconnect in shutdown to prevent battery drain during sleep mode. Use Value: Output disconnect and <1µA shutdown current preserve battery charge over weeks of storage; programmable soft-start prevents inrush-induced brownouts during wake-up. | Use Scenario: Portable USB-powered accessories (e.g., Bluetooth adapters, flash drives) requiring 5V output from variable-input sources like USB-C PD or legacy 5V USB ports. IC Role / Device Role / Timing Role: Input voltage conditioner accepting 2.4–7V input and delivering regulated 5V at up to 500mA with reverse current blocking. Use Value: Reverse current limit (500mA) prevents backfeed into upstream USB port; wide VIN range accommodates USB-C PD negotiation voltages without additional circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63020DSJR | 3.5V–12V input, 1.2V–5.5V output, 2A max, 2.5MHz switching, integrated inductor option available | Higher input/output voltage flexibility but lower efficiency at light loads (65µA IQ vs. 25µA) | Select for higher output current or integrated inductor needs; avoid if ultra-low IQ is critical for battery lifetime |
| MAX77827BEWC+ | 2.5V–5.5V input, 2.6V–5.2V output, 2A max, I²C programmable, 2.2MHz switching | Narrower VIN/VOUT range, digital interface required, no Burst Mode equivalent | Select when dynamic output voltage adjustment or telemetry is needed; not suitable for simple analog-only designs |
Compared with TPS63020DSJR and MAX77827BEWC+, the LTC3534EDHC#TRPBF offers superior light-load efficiency due to its 25µA Burst Mode IQ and seamless VIN/VOUT crossover, making it optimal for long-duration portable instrumentation where battery life and analog simplicity outweigh programmability or higher current demands.
Availability
LTC3534EDHC#TRPBF is available at Aetrix Electronics and suitable for medical instrumentation, portable barcode readers, inventory terminals, USB power delivery, and handheld GPS requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC3534EDHC#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.
The LTC3534EDHC#TRPBF belongs to Linear's precision power conversion product line, engineered specifically for battery-powered portable electronics demanding high efficiency across wide input/output voltage ranges without sacrificing reliability or thermal performance.
FAQ
What is the minimum input voltage required for the LTC3534EDHC#TRPBF to start up?
The LTC3534EDHC#TRPBF has a guaranteed input start-up voltage of 2.4V, with typical operation beginning at 2.2V. This allows reliable startup from partially discharged 4-cell alkaline or NiMH batteries down to ~0.55V per cell, making it suitable for deep-discharge portable applications where extended runtime is critical. The device maintains regulation across the full 2.4V–7V input range.
How does Burst Mode® operation affect output voltage ripple on the LTC3534EDHC#TRPBF?
Burst Mode® operation on the LTC3534EDHC#TRPBF introduces variable-frequency switching that results in typical 2% peak-to-peak output ripple at light loads. This ripple can be reduced by increasing output capacitance to ≥47µF or adding a feedforward capacitor across the upper FB divider resistor. Fixed-frequency PWM mode eliminates this ripple entirely, delivering low-noise output ideal for sensitive analog circuits.
Can the LTC3534EDHC#TRPBF regulate output voltages below 1.8V?
The LTC3534EDHC#TRPBF supports output voltages as low as 400mV in buck-only mode, but requires an external Schottky diode from SW2 to VOUT when VOUT < 1.8V due to increased RDS(ON) of synchronous switch D. Below 0.9V, current limit folds back to 800mA, and Burst Mode® is inhibited below 1.6V. For sub-1.8V outputs, design validation against load regulation and thermal performance is essential.
What thermal management is required for the LTC3534EDHC#TRPBF in a 500mA, 5V application?
In a 500mA/5V application with 3.6–6.4V input, the LTC3534EDHC#TRPBF dissipates ~350mW at peak load. Its DHC package has θJC = 4°C/W, so a minimum 100mm² copper pour connected to the exposed pad (Pin 17) and multiple thermal vias is required to maintain junction temperature below 125°C. Without adequate PCB copper, thermal shutdown may activate under sustained load.
Is the LTC3534EDHC#TRPBF pin-compatible with other packages in the LTC3534 family?
No - the LTC3534EDHC#TRPBF uses the 16-lead DFN (DHC) package with specific pinout and thermal pad layout, while the LTC3534EGN#TRPBF uses a 16-lead SSOP package with different pin assignments (e.g., GND pins relocated). PCB layout and thermal design are not interchangeable; migration requires full schematic and layout revision. Both share identical electrical functionality and feature set.
LTC3534EDHC#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.4V
- Voltage - Input (Max):
- 7V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- 7V
- Current - Output:
- 500mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (5x3)
LTC3534EDHC#TRPBF FAQ
1.How can I place an order for LTC3534EDHC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3534EDHC#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 LTC3534EDHC#TRPBF reliable?
The price and inventory of LTC3534EDHC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3534EDHC#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3534EDHC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3534EDHC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3534EDHC#TRPBF?
LTC3534EDHC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3534EDHC#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 LTC3534EDHC#TRPBF?
For technical support, including LTC3534EDHC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3534EDHC#TRPBF requirements.
6.How does Aetrix verify that LTC3534EDHC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3534EDHC#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 LTC3534EDHC#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3534EDHC#TRPBF?
All LTC3534EDHC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3534EDHC#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 LTC3534EDHC#TRPBF part is unused and in its original packaging.
Return procedure for LTC3534EDHC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3534EDHC#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…
