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Analog Devices Inc. LTC3336EV#TRPBF
- Part No.:
- LTC3336EV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3336EV#TRPBF.pdf
- Description:
- IC REG BUCK PROG 250MA 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,389
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Product details
Overview
LTC3336EV#TRPBF from Analog Devices is a 15V/250mA nanopower hysteretic buck DC/DC converter optimized for primary battery systems. It delivers up to 250mA output current from 2.5V–15V input, achieves 65nA quiescent current in regulation at no load (for VOUT < 2.4V), supports 16 pin-strapped output voltages (1.2V–5.0V), and offers four selectable peak input currents (10/30/100/300mA). It enables ultra-long-life power for remote industrial sensors and asset trackers powered by LiSOCl₂ or multi-cell AAA batteries.
For engineers reviewing the LTC3336EV#TRPBF datasheet, LTC3336EV#TRPBF pinout, LTC3336EV#TRPBF application, or LTC3336EV#TRPBF equivalent, key selection criteria include its nanopower sleep mode, programmable IPEAK matching battery capacity curves, PGOOD output for system monitoring, dropout operation with low IQ, and compatibility with compact 2mm × 2mm LQFN packaging.
Technical Context
The LTC3336EV#TRPBF employs a hysteretic control architecture with internal P- and N-channel MOSFETs, enabling high efficiency across ultra-light to moderate loads without external compensation. Its sleep/wake cycle is governed by precise voltage thresholds (±0.3% hysteresis) and dynamically adjusts switching based on load and programmed IPEAK.
It features dual-mode INTVCC generation-bootstrapped from VOUT when VOUT ≥ 2.4V (reducing VIN IQ) or internally regulated at ~2V otherwise-and integrates a 10kΩ pull-down on VOUT during shutdown. The PGOOD output asserts high when VOUT is within ±2.5% of regulation and references VOUT, not GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 15V - supports single- to triple-cell LiSOCl₂, 3×–8× AAA, and wide-input industrial supplies. |
| Output Current | Up to 250mA - deliverable only at 300mA IPEAK setting; lower IPEAK settings limit max load to 8.3/25/83mA respectively. |
| VIN Quiescent Current | 65nA (VOUT < 2.4V, no load) - enables >10-year battery life in always-on remote sensors. |
| Output Voltage Options | 16 fixed values (1.2V–5.0V) - selected via 4-pin OUT[3:0] strap; 1.2V/1.8V/2.5V/3.0V support single-pin power-up defaults. |
| Peak Input Current | 10/30/100/300mA - set via IPK[1:0]; determines inductor sizing, efficiency trade-offs, and battery stress profile. |
| PGOOD Threshold | 90–95% of VOUT - provides reliable power-good signaling for microcontroller reset or system enable sequencing. |
| Package | 12-lead 2mm × 2mm LQFN - exposes thermal pad (Pin 13 = GND); MSL3, –40°C to 125°C junction temp rating. |
Pinout & Package
The LTC3336EV#TRPBF is housed in a 12-lead 2mm × 2mm plastic QFN (LQFN) package with exposed thermal pad (Pin 13) soldered to PCB ground. Pin 13 is electrically and thermally connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Battery input supply | Accepts 2.5V–15V; requires ≥0.1µF ceramic bypass; UVLO triggers at 1.5–2.2V falling. |
| EN (Pin 2) | Enable input (INTVCC-referenced) | Logic high enables regulation; logic low discharges VOUT via 10kΩ to GND. |
| IPK1 (Pin 3) | Peak current select bit MSB | Used with IPK0 to set IPEAK = 10/30/100/300mA; tied to GND in WLCSP variants. |
| IPK0 (Pin 4) | Peak current select bit LSB | Programs IPEAK with IPK1; must be tied to INTVCC (1) or GND (0). |
| INTVCC (Pin 5) | Internal logic supply | ~2V (if VOUT < 2.4V) or VOUT (if ≥2.4V); powers EN/IPK inputs; ≤10µA load allowed. |
| PGOOD (Pin 6) | Power-good status output | Open-drain, VOUT-referenced; high when VOUT within 90–95% of target; sinks ≤1mA. |
| OUT3–OUT0 (Pins 7–10) | Output voltage select bits | 4-bit code selects one of 16 VOUT values; logic high = INTVCC or VOUT; logic low = GND. |
| VOUT (Pin 11) | Regulated output sense & reference | Feedback node; also serves as logic high reference for OUT[3:0] and PGOOD. |
| SW (Pin 12) | Buck switch node | Connects to inductor; drives P-ch (high-side) and N-ch (low-side) MOSFETs; max 400mA peak current. |
| GND (Pin 13, Exposed Pad) | Power & thermal ground | Mandatory PCB solder connection; provides primary thermal path (θJA = 71°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Nanopower sleep mode | 65nA VIN IQ at no load enables >10-year operation on coin cells or LiSOCl₂ batteries. |
| Programmable peak input current | Four discrete IPEAK options (10/30/100/300mA) let designers match battery polarization limits and optimize efficiency vs. size. |
| Hysteretic regulation with sleep/wake | ±0.3% output hysteresis minimizes switching loss; controlled valley-current ramp-down prevents diode conduction loss during sleep entry. |
| Integrated power-good indicator | PGOOD output referenced to VOUT ensures accurate system-level power sequencing without external comparators. |
| Dropout mode with low-IQ maintenance | P-channel MOSFET fully enhances below VIN ≈ VOUT + RDS(ON)·ILOAD; maintains regulation with sub-100nA IQ in dropout. |
Applications
| Remote Industrial Sensors | Asset Trackers |
|---|---|
Use Scenario: Battery-powered gas meters, water flow sensors, or temperature transmitters deployed in unpowered field locations for >10 years. IC Role / Device Role / Timing Role: Primary buck regulator supplying MCU, RF transceiver, and sensor interface from LiSOCl₂ cell(s). Use Value: 65nA quiescent current and programmable 10mA/30mA IPEAK extend battery life while preventing voltage sag during pulse transmissions. | Use Scenario: GPS-enabled logistics tags attached to shipping containers or pallets, operating intermittently over multi-year deployments. IC Role / Device Role / Timing Role: Keeps MCU and GNSS module powered during sleep; wakes to acquire position and transmit via LTE-M/NB-IoT. Use Value: Sleep/wake hysteresis and 16 VOUT options allow precise matching to MCU core voltage (e.g., 1.8V) and RF IC requirements (e.g., 3.3V). |
| Electronic Door Locks | Keep-Alive Supplies / Battery Backup |
Use Scenario: Smart locks powered by alkaline AA/AAA batteries, requiring reliable wake-on-RF and motor drive pulses without premature battery depletion. IC Role / Device Role / Timing Role: Main power source for microcontroller, Bluetooth SoC, and solenoid driver circuitry. Use Value: 250mA output capability at 300mA IPEAK supports brief high-current motor actuation; PGOOD enables safe lock/unlock state verification. | Use Scenario: Real-time clock (RTC) or SRAM backup in industrial controllers where main supply may fail unpredictably. IC Role / Device Role / Timing Role: Low-leakage keep-alive regulator maintaining 3.0V or 3.3V rail during AC loss or brownout events. Use Value: VOUT pull-down resistor (10kΩ in shutdown) and overvoltage clamp (1MΩ, +5%) prevent backup battery drain and protect downstream memory. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62840DRVR | Lower IQ (60nA), fixed 1.8V/2.3V/3.3V outputs, no IPEAK programming, 2.7V–6.5V input range. | Suitable for simpler, narrower-input designs where peak current tuning isn't needed. | Select when input stays within 2.7–6.5V and fixed VOUT suffices; avoid if >6.5V input or programmable IPEAK is required. |
| MAX17222ETA+T | 600mA output, 300nA IQ, 1.8V–5.5V input, 12-pin 2mm × 2mm TDFN, no PGOOD or IPEAK selection. | Better for higher-current, lower-voltage IoT nodes needing more headroom than 250mA. | Choose for >250mA loads or when footprint compatibility with MAX1722x family is critical; lacks PGOOD and IPEAK flexibility. |
Compared with TPS62840DRVR and MAX17222ETA+T, the LTC3336EV#TRPBF uniquely combines ultra-low IQ, wide 2.5V–15V input, programmable IPEAK, 16 VOUT options, and integrated PGOOD-making it optimal for long-life, multi-battery-format, and system-monitoring–critical applications.
Availability
LTC3336EV#TRPBF is available at Aetrix Electronics and suitable for remote industrial sensors, asset trackers, and electronic door locks requiring stable component supply and long-term manufacturability.
Supply support for LTC3336EV#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3336EV#TRPBF belongs to Analog Devices' nanopower DC/DC converter product line, engineered specifically for ultra-low-power, battery-constrained applications where longevity, input voltage flexibility, and system-level reliability are paramount.
FAQ
What is the minimum input voltage required for the LTC3336EV#TRPBF to regulate output?
The LTC3336EV#TRPBF requires a minimum input voltage of 2.5V to maintain regulation across all output settings. Below this, undervoltage lockout activates (falling threshold = 1.5–1.75V), disabling switching and placing the device in shutdown with 45nA VIN current. Regulation resumes only after VIN rises above the rising UVLO threshold (1.95–2.2V).
How does the LTC3336EV#TRPBF achieve 65nA quiescent current?
The LTC3336EV#TRPBF achieves 65nA VIN quiescent current by entering a deep sleep state when VOUT is in regulation and load current is near zero. In this state, switching halts, internal bias circuits are minimized, and for VOUT < 2.4V, INTVCC is generated from an ultra-low-power bandgap reference (~2V), avoiding bootstrapping losses.
Can the LTC3336EV#TRPBF be used with a 5.0V output setting and 15V input?
Yes, the LTC3336EV#TRPBF supports a 5.0V output with 15V input. At this condition, efficiency remains >85% at 100mA load (300mA IPEAK), and INTVCC is bootstrapped from VOUT, reducing VIN IQ further. Inductor selection must follow Table 4 (e.g., 47µH for 15V input, 300mA IPEAK) to ensure stable hysteretic operation.
What happens to VOUT when the EN pin is pulled low on the LTC3336EV#TRPBF?
When EN is pulled low, the LTC3336EV#TRPBF disables switching and actively discharges VOUT through an internal 10kΩ resistor to GND. This ensures rapid, controlled rail collapse for safe system shutdown-critical in applications like electronic door locks where residual voltage could compromise security or timing.
Is the LTC3336EV#TRPBF pin-compatible with the LTC3336-1 or LTC3336-2 variants?
No, the LTC3336EV#TRPBF (LQFN) is not pin-compatible with the WLCSP variants LTC3336ACBZ-1-R7 or LTC3336ACBZ-2-R7. While functional behavior is similar, the LQFN has 13 pins (including exposed GND pad) and uses IPK1 as an active input, whereas WLCSP packages omit IPK1 (tied internally) and use different ball mapping-requiring separate PCB layouts.
LTC3336EV#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 250mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LQFN (2x2)
LTC3336EV#TRPBF FAQ
1.How can I place an order for LTC3336EV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3336EV#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 LTC3336EV#TRPBF reliable?
The price and inventory of LTC3336EV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3336EV#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3336EV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3336EV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3336EV#TRPBF?
LTC3336EV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3336EV#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 LTC3336EV#TRPBF?
For technical support, including LTC3336EV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3336EV#TRPBF requirements.
6.How does Aetrix verify that LTC3336EV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3336EV#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 LTC3336EV#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3336EV#TRPBF?
All LTC3336EV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3336EV#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 LTC3336EV#TRPBF part is unused and in its original packaging.
Return procedure for LTC3336EV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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