My Inquiry
My Account
Analog Devices Inc. LTC3122EDE#PBF
- Part No.:
- LTC3122EDE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LTC3122EDE#PBF.pdf
- Description:
- IC REG BOOST ADJ 2.5A 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,516
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3122EDE#PBF from Analog Devices (formerly Linear Technology) is a synchronous step-up DC/DC converter with true output disconnect, 2.5A current limit, and programmable output voltage up to 15V. It operates from input voltages as low as 1.8V at startup and sustains regulation down to 500mV after startup, enabling extended runtime in battery-powered systems such as piezo actuators and RF power stages.
For engineers reviewing the LTC3122EDE#PBF datasheet, LTC3122EDE#PBF pinout, LTC3122EDE#PBF application, or LTC3122EDE#PBF equivalent, key selection criteria include its 1.8V–5.5V input range, 2.2V–15V adjustable output, 25µA Burst Mode quiescent current, 100kHz–3MHz adjustable switching frequency, and thermally enhanced 12-lead 3mm × 4mm DFN package with exposed PGND pad.
Technical Context
The LTC3122EDE#PBF implements fixed-frequency current-mode PWM control with adaptive slope compensation for stable operation across wide input/output ratios. Its dual-MOSFET synchronous rectification architecture uses an N-channel main switch (RDS(ON) = 121 mΩ) and P-channel synchronous rectifier (RDS(ON) = 188 mΩ), enabling up to 95% efficiency at full load.
It integrates a 10ms closed-loop soft-start, zero-current detection for light-load efficiency, anti-ringing control activated when VOUT ≥ VIN + 2V, and overvoltage lockout at ~16.2V. The device supports external clock synchronization via PWM/SYNC pin and offers selectable Burst Mode operation with 25µA IQ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V (startup); sustains regulation down to 0.5V after startup - enables deep discharge of single-cell Li-ion or NiMH batteries |
| Output Voltage Range | 2.2V to 15V (programmable via FB resistor divider) - supports 5V, 7.5V, 12V, and 15V analog rails from low-voltage sources |
| Switch Current Limit | 2.5A typical (3.5A peak) - delivers up to 800mA at 12V output from 5V input with high reliability under transient loads |
| Quiescent Current | 25µA in Burst Mode, <1µA in shutdown - minimizes standby drain in always-on sensor or IoT nodes |
| Switching Frequency | 100kHz to 3MHz (adjustable via RT resistor or external sync clock) - allows trade-off between EMI suppression and solution size |
| Efficiency | Up to 95% (synchronous rectification) - eliminates external Schottky losses and reduces thermal footprint |
| Output Disconnect | True disconnect in shutdown (VOUT fully discharges, no body-diode leakage) - prevents backfeed and enables safe hot-swap operation |
Pinout & Package
The LTC3122EDE#PBF is housed in a 12-lead, 3mm × 4mm × 0.75mm plastic DFN package with exposed PGND pad (Pin 13), requiring soldering to PCB ground plane for rated thermal performance (θJA = 43°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1) | Power switch node | Connects to inductor; internal anti-ringing resistor activates when VOUT ≥ VIN + 2V to suppress EMI |
| PGND (2,13) | Power ground return | Exposed pad must be soldered to PCB ground plane; provides low-impedance path for high di/dt currents |
| VIN (3) | Main input supply | Accepts 1.8V–5.5V; powers internal circuitry unless VOUT > VIN and VIN < 3V |
| PWM/SYNC (4) | Mode control & clock sync | High = PWM mode; Low = Burst Mode; external clock = synchronized operation (100ns–2µs pulse width) |
| VCC (5) | Internal LDO output | Regulated ~4.25V rail derived from VIN or VOUT; requires ≥4.7µF ceramic capacitor to SGND |
| RT (6) | Oscillator frequency set | Resistor to SGND programs fOSC = 57.6 / RT (MHz/kΩ); enables precise noise shaping |
| VC (7) | Error amplifier output | Connects to RC compensation network; sets loop stability and transient response |
| FB (8) | Feedback input | Senses resistor divider; regulates VOUT = 1.202V × (1 + R1/R2); tolerance ±2.1% over temp |
| SD (9) | Shutdown control | Logic-high (>1.6V) enables operation; logic-low (<0.25V) disables with <1µA IQ |
| SGND (10) | Signal ground reference | Separate from PGND; connects to (–) side of output capacitor to minimize noise coupling |
| VOUT (11) | Regulated output & rectifier source | Drives synchronous P-MOSFET gate; disconnected from VIN during shutdown |
| CAP (12) | Synchronous rectifier bias reference | 100nF capacitor to VOUT creates ~5.6V below VOUT rail to drive P-MOSFET gate |
Key Features
| Feature | Design Value |
|---|---|
| True output disconnect | Eliminates reverse current and body-diode conduction during shutdown, allowing VOUT to fully discharge to 0V |
| Adjustable Burst Mode | Reduces quiescent current to 25µA while maintaining regulation - critical for battery life in intermittent-sensing applications |
| Inrush current limiting | 10ms closed-loop soft-start prevents input surge during turn-on, protecting weak sources like backup capacitors |
| Wide input voltage support | Operates from 500mV post-startup - extracts maximum energy from depleted batteries or supercaps |
| Robust protection suite | Includes short-circuit current foldback (1.6A limit), thermal shutdown (170°C), and output overvoltage lockout (16.2V) |
Applications
| RF Power Supply | Piezo Actuator Driver |
|---|---|
Use Scenario: Generating stable 12V rail from a 3.3V or 5V system bus to power RF front-end amplifiers in portable transceivers. IC Role / Device Role / Timing Role: Synchronous boost converter providing regulated, low-noise 12V output with fast transient response to handle burst-mode RF transmission. Use Value: Delivers 800mA at 12V from 5V input with 95% efficiency and true output disconnect to prevent RF stage backfeed during sleep cycles. | Use Scenario: Driving high-voltage piezoelectric elements (e.g., ultrasonic cleaners, precision positioning stages) requiring 5V–15V programmable excitation. IC Role / Device Role / Timing Role: Adjustable-output boost regulator supplying precise, ripple-controlled voltage with inrush limiting to avoid mechanical shock on piezo element startup. Use Value: Enables 2.2V–15V output programming and 25µA Burst Mode IQ to extend battery life in handheld diagnostic tools. |
| Small DC Motor Control | 12V Analog Rail Generator |
Use Scenario: Powering miniature brushed DC motors (e.g., in medical pumps or lab automation) from single-cell lithium batteries. IC Role / Device Role / Timing Role: High-efficiency boost converter delivering regulated motor voltage with robust short-circuit protection and thermal shutdown. Use Value: Sustains operation down to 0.5V input, maximizing usable battery capacity; 2.5A current limit handles motor stall conditions safely. | Use Scenario: Creating clean 12V analog supply for op-amps, ADCs, or sensors from 3.3V or 5V system rails or backup capacitors. IC Role / Device Role / Timing Role: Low-noise, high-PSRR boost converter with selectable PWM/Burst modes to balance ripple vs. efficiency in mixed-signal systems. Use Value: Adjustable 100kHz–3MHz switching frequency allows EMI filtering around sensitive analog bands; output disconnect isolates analog rail during system sleep. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher 5.5A current limit; fixed 500kHz/1MHz switching; no output disconnect; 2.7V–12V input | Lacks true output disconnect and sub-1V operation - unsuitable for ultra-low-VIN or backfeed-sensitive designs | Select only if higher current and simpler layout outweigh need for deep-discharge support and isolation |
| MAX17222ETA+ | Lower 1.2A current limit; 1.8V–5.5V input; 2.5V–5.25V output; 1.5µA IQ; no output disconnect | Restricted to ≤5.25V output; no VOUT > VIN capability - cannot replace LTC3122EDE#PBF in 12V/15V applications | Consider only for low-voltage, ultra-low-IQ applications where 12V output is unnecessary |
Compared with TPS61088RHLR and MAX17222ETA+, the LTC3122EDE#PBF uniquely combines 0.5V operational floor, true output disconnect, and 15V programmable output - making it irreplaceable in deep-discharge, isolated, or high-voltage boost applications.
Availability
LTC3122EDE#PBF is available at Aetrix Electronics and suitable for RF power supplies, piezo actuator drivers, small DC motor controllers, and 12V analog rail generation requiring stable component supply across industrial, medical, and portable electronics programs.
Supply support for LTC3122EDE#PBF 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 LTC3122 product line was designed specifically for high-efficiency, ultra-low-input-voltage synchronous boost conversion in space-constrained, battery-sensitive applications - emphasizing output disconnect, inrush control, and wide output programmability.
FAQ
What is the minimum input voltage required to start up the LTC3122EDE#PBF?
The LTC3122EDE#PBF starts up from a minimum input voltage of 1.7V (typical 1.8V, max 1.9V) with VOUT = 0V. Once regulation is established and VOUT ≥ 2.2V, it continues operating down to 0.5V input - a key advantage for maximizing energy extraction from aging or deeply discharged batteries. This behavior is confirmed in the Electrical Characteristics table under "Minimum Start-Up Voltage" and "Input Voltage Range After VOUT ≥ 2.2V".
Does the LTC3122EDE#PBF provide true output disconnect during shutdown?
Yes, the LTC3122EDE#PBF provides true output disconnect: when SD is pulled low, the internal P-channel synchronous rectifier is fully turned off, eliminating body-diode conduction and allowing VOUT to discharge completely to 0V. This prevents backfeed into the input source and is explicitly verified in the Features section, Absolute Maximum Ratings notes, and Applications Information on output disconnect.
What is the switching frequency range of the LTC3122EDE#PBF and how is it programmed?
The LTC3122EDE#PBF supports an adjustable switching frequency from 100kHz to 3MHz. It is programmed using an external resistor (RT) from the RT pin to SGND, following fOSC(MHz) = 57.6 / RT(kΩ). The oscillator can also be synchronized to an external clock applied to the PWM/SYNC pin, with RT adjusted to ~25% below the sync frequency per the datasheet formula.
How does Burst Mode operation reduce power consumption in the LTC3122EDE#PBF?
In Burst Mode (enabled by pulling PWM/SYNC low), the LTC3122EDE#PBF reduces quiescent current to 25µA by delivering energy in discrete bursts and entering sleep mode when regulation is satisfied. During sleep, both switches are off and only essential bias circuits remain active. Output voltage droop (~1%) triggers resumption of switching - a documented behavior validated in Typical Performance Characteristics (Figures G01–G03) and Applications Information.
What package type and thermal characteristics apply to the LTC3122EDE#PBF?
The LTC3122EDE#PBF uses a 12-lead 3mm × 4mm × 0.75mm plastic DFN package (DE grade) with exposed PGND pad (Pin 13). Its thermal resistance is θJA = 43°C/W and θJC = 5°C/W, but these values require soldering the exposed pad to the PCB ground plane - a requirement explicitly stated in the Absolute Maximum Ratings footnote and Pin Configuration diagram.
LTC3122EDE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.2V
- Voltage - Output (Max):
- 15V
- Current - Output:
- 2.5A (Switch)
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DFN (4x3)
LTC3122EDE#PBF FAQ
1.How can I place an order for LTC3122EDE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3122EDE#PBF 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 LTC3122EDE#PBF reliable?
The price and inventory of LTC3122EDE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3122EDE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3122EDE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3122EDE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3122EDE#PBF?
LTC3122EDE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3122EDE#PBF 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 LTC3122EDE#PBF?
For technical support, including LTC3122EDE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3122EDE#PBF requirements.
6.How does Aetrix verify that LTC3122EDE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3122EDE#PBF 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 LTC3122EDE#PBF meets industry standards.
7.What is the process for return or replacement of LTC3122EDE#PBF?
All LTC3122EDE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3122EDE#PBF, 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 LTC3122EDE#PBF part is unused and in its original packaging.
Return procedure for LTC3122EDE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3122EDE#PBF 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…
