My Inquiry
My Account
Analog Devices Inc. LTC3122HMSE#TRPBF
- Part No.:
- LTC3122HMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3122HMSE#TRPBF.pdf
- Description:
- IC REG BOOST ADJ 2.5A 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,683
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3122HMSE#TRPBF from Analog Devices (formerly Linear Technology) is a synchronous step-up DC/DC converter with true output disconnect, 2.5A current limit, adjustable 100kHz–3MHz switching frequency, and operation down to 500mV input after startup. It delivers up to 15V output from low-voltage sources such as single-cell Li-ion or backup capacitors, enabling high-efficiency power for RF power stages and piezo actuators.
For engineers reviewing the LTC3122HMSE#TRPBF datasheet, LTC3122HMSE#TRPBF pinout, LTC3122HMSE#TRPBF application, or LTC3122HMSE#TRPBF equivalent, key selection criteria include its 150°C junction temperature rating, output disconnect capability, Burst Mode® quiescent current of 25µA, and thermally enhanced 12-lead MSOP package with exposed PGND pad.
Technical Context
The LTC3122HMSE#TRPBF employs current-mode PWM control with adaptive slope compensation for stable regulation across wide VIN/VOUT ratios and fast transient response. Its dual-MOSFET synchronous rectification-comprising an N-channel main switch (0.121Ω RDS(ON)) and P-channel synchronous rectifier (0.188Ω RDS(ON))-enables up to 95% efficiency at full load while supporting discontinuous conduction mode via zero-current detection.
It integrates a programmable oscillator (RT pin), internal soft-start (10ms), overvoltage lockout (16.2V), thermal shutdown (170°C), and anti-ringing control activated when VOUT ≥ VIN + 2V. The VCC regulator autonomously selects between VIN and VOUT to maintain 4.25V bias rail, ensuring robust gate drive under ultra-low-input conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V start-up; sustains regulation down to 0.5V after VOUT ≥ 2.2V - enables energy harvesting and deep battery discharge use cases. |
| Output Voltage Range | 2.2V to 15V, set by external resistor divider on FB pin - supports 5V, 7.5V, 12V, and 15V analog rails from low-voltage sources. |
| Switch Current Limit | 2.5A typical (3.5A max), independent of VIN/VOUT except below 1.5V - ensures reliable boost into moderate loads without external current sensing. |
| Quiescent Current | 25µA in Burst Mode®, <1µA in shutdown - extends battery life in always-on sensor or IoT edge nodes. |
| Switching Frequency | Adjustable 100kHz–3MHz via RT resistor; synchronizable to external clock - allows EMI optimization and noise-sensitive system integration. |
| Package & Temp Range | 12-lead thermally enhanced MSOP with exposed PGND pad; rated for –40°C to +150°C junction - suitable for automotive under-hood and industrial motor control environments. |
| Efficiency | Up to 95% at full load (e.g., 5V→12V @ 800mA) - minimizes thermal stress and eliminates need for heatsinks in compact designs. |
Pinout & Package
Package: 12-lead plastic MSOP (3mm × 4mm × 1.1mm), thermally enhanced with exposed PGND pad (Pin 13) requiring PCB soldering for rated θJC = 10°C/W performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1) | Power switch node | Connects to inductor; features anti-ringing resistor activation when VOUT ≥ VIN + 2V to suppress EMI in DCM. |
| PGND (2,13) | Power ground return | Exposed pad (Pin 13) must be soldered to PCB ground plane; primary thermal path and high-current return for SW and VOUT paths. |
| VIN (3) | Main input supply | Accepts 1.8V–5.5V; powers internal circuitry unless VOUT > VIN and VIN < 3V, where VCC draws from VOUT instead. |
| PWM/SYNC (4) | Mode control & clock sync | High = fixed-frequency PWM; Low = Burst Mode®; external clock = synchronized operation - no floating allowed. |
| VCC (5) | Bias rail output | Regulated ~4.25V output; powers gate drivers and control logic; requires ≥4.7µF ceramic capacitor to SGND. |
| RT (6) | Oscillator programming | Resistor to SGND sets fSW per fOSC(MHz) = 57.6 / RT(kΩ); for sync, RT = 73.2 / fSYNC(MHz). |
| VC (7) | Error amplifier output | Loop compensation node; connects RC network to SGND for stability tuning per operating point. |
| FB (8) | Feedback input | Senses resistive divider from VOUT; regulates VOUT = 1.202V × (1 + R1/R2); input bias ≤50nA ensures accuracy. |
| SD (9) | Shutdown control | Logic-level input: <0.25V = shutdown (<1µA IQ); >1.6V = active; tolerant of voltages above VIN/VOUT. |
| SGND (10) | Signal ground reference | Separate from PGND; connects to (–) side of output capacitor and compensation network for noise immunity. |
| VOUT (11) | Regulated output & rectifier source | Drives synchronous P-channel MOSFET; disconnected from VIN during SD = low - enables true output discharge. |
| CAP (12) | Synchronous rectifier gate reference | Connects 100nF cap to VOUT; establishes ~5.6V below VOUT to bias P-MOSFET gate - critical for low-loss rectification. |
Key Features
| Feature | Design Value |
|---|---|
| True output disconnect | VOUT fully discharges to 0V in shutdown with <1µA input current - eliminates backfeed and enables safe hot-swap or system sequencing. |
| Burst Mode® operation | Reduces IQ to 25µA at light/no load while maintaining regulation - extends runtime in battery-powered sensors and wearables. |
| Inrush current limiting | Internal 10ms closed-loop soft-start limits peak input surge - protects weak sources like coin cells and supercaps during power-up. |
| Ultra-low input operation | Starts from 1.8V and sustains regulation down to 0.5V - maximizes usable energy from aging batteries or energy harvesters. |
| Robust protection suite | Includes overvoltage lockout (16.2V), thermal shutdown (170°C), short-circuit current foldback (1.6A limit), and UVLO on VCC. |
Applications
| RF Power Amplifier Bias | Piezo Actuator Drive |
|---|---|
|
Use Scenario: Generating stable 12V bias rail for GaAs FET amplifiers in portable radios or IoT transceivers powered by single-cell Li-ion (2.8–4.2V). IC Role / Device Role / Timing Role: Synchronous boost converter providing regulated, low-noise, high-current 12V output with output disconnect during sleep modes. Use Value: Enables >95% efficiency at 800mA load and 25µA quiescent current in Burst Mode®, extending transmit time per charge cycle. |
Use Scenario: Driving high-voltage piezoelectric transducers (e.g., ultrasonic cleaners, haptic feedback) requiring 5–15V pulses from 3.3V microcontroller rails. IC Role / Device Role / Timing Role: Adjustable-output boost converter delivering precise voltage-controlled actuation with fast transient response and inrush limiting. Use Value: Programmable 2.2–15V output and 2.5A current limit support diverse piezo capacitance and drive strength requirements without redesign. |
| Small DC Motor Supply | 12V Analog Rail Generator |
|
Use Scenario: Powering miniature brushed DC motors (e.g., in medical pumps or robotics) from 3.6V LiPo packs, requiring 5–12V at up to 800mA. IC Role / Device Role / Timing Role: High-efficiency synchronous boost IC with output disconnect to prevent motor coasting and enable clean stop/start control. Use Value: True output disconnect eliminates body-diode conduction, allowing motor voltage to collapse rapidly and preventing unintended motion. |
Use Scenario: Creating isolated 12V analog supply for op-amps, ADCs, or DACs in battery-powered instrumentation, sourced from 5V USB or 3.3V system rails. IC Role / Device Role / Timing Role: Precision-adjustable boost converter with low output ripple (<2% pk-pk in Burst Mode®) and excellent line/load regulation. Use Value: Feedback reference tolerance of ±2% (1.178–1.225V) and <50nA FB bias current ensure stable 12V output accuracy across temperature and load. |
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 switch current; fixed 500kHz/1MHz/2.2MHz options; no output disconnect; 1.8–5.5V input; 2.5–15.5V output. | Lacks true output disconnect and ultra-low 0.5V dropout - unsuitable for systems requiring VOUT discharge or deep battery utilization. | Select when higher peak current (>2.5A) is needed and output disconnect is not required; verify layout for higher switching losses. |
| MAX17222ETA+ | Lower 1.2A current limit; 0.5–5.5V input; 2.5–5.5V output; 300nA IQ in shutdown; 12-pin TDFN; only –40°C to +85°C rating. | Restricted to ≤5.5V output and lower current; lacks programmable frequency and thermal grade - limited to consumer-grade low-power apps. | Choose for ultra-low-IQ battery monitoring or wearables where 150°C operation and 15V output are unnecessary. |
Compared with TPS61088RHLR and MAX17222ETA+, the LTC3122HMSE#TRPBF uniquely combines 150°C operation, true output disconnect, 0.5V minimum operating input, and 2.5A current capability - making it the only option qualified for automotive under-hood or industrial high-temp boost applications requiring full system isolation.
Availability
LTC3122HMSE#TRPBF is available at Aetrix Electronics and suitable for RF power amplifiers, piezo actuator drivers, and 12V analog rail generation requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for LTC3122HMSE#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) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving precision instrumentation, industrial automation, and communications markets.
The LTC3122 product line was designed specifically for high-efficiency, ultra-low-input synchronous boost conversion in space-constrained, thermally demanding applications - emphasizing output disconnect, wide temperature operation, and robust protection.
FAQ
What is the maximum junction temperature rating for the LTC3122HMSE#TRPBF?
The LTC3122HMSE#TRPBF is rated for –40°C to +150°C operating junction temperature, confirmed by its H-grade marking and thermal specifications (θJA = 40°C/W, θJC = 10°C/W). This exceeds the E/I-grade versions (–40°C to +125°C) and qualifies it for under-hood automotive and industrial motor control environments where ambient temperatures exceed 105°C.
Does the LTC3122HMSE#TRPBF support true output disconnect, and how does it work?
Yes, the LTC3122HMSE#TRPBF provides true output disconnect: when the SD pin is pulled low, the internal P-channel synchronous rectifier is fully turned off, eliminating body-diode conduction. This allows VOUT to discharge completely to 0V and prevents reverse current flow from VOUT to VIN - a critical feature for system sequencing and safety-critical applications.
What is the minimum input voltage required for the LTC3122HMSE#TRPBF to start and sustain regulation?
The LTC3122HMSE#TRPBF starts regulation from a minimum input voltage of 1.8V. Once started and VOUT reaches ≥2.2V, it continues regulating down to 0.5V input - a key capability for maximizing energy extraction from deeply discharged batteries or backup capacitors, as verified in the Electrical Characteristics table (Min Start-Up Voltage = 1.7V typ).
How is the switching frequency programmed on the LTC3122HMSE#TRPBF?
The switching frequency of the LTC3122HMSE#TRPBF is set using an external resistor (RT) from Pin 6 (RT) to SGND, following fOSC(MHz) = 57.6 / RT(kΩ). For example, a 57.6kΩ resistor yields 1MHz. When synchronizing to an external clock, RT is calculated as 73.2 / fSYNC(MHz) to program the internal oscillator ~25% below the sync frequency.
What package type and thermal enhancements does the LTC3122HMSE#TRPBF use?
The LTC3122HMSE#TRPBF uses a 12-lead plastic MSOP package with an exposed PGND pad (Pin 13). This thermally enhanced construction achieves θJC = 10°C/W when the exposed pad is soldered to the PCB ground plane - essential for dissipating heat in high-current or high-temperature applications without additional heatsinking.
LTC3122HMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width) 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):
- 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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-MSOP-EP
LTC3122HMSE#TRPBF FAQ
1.How can I place an order for LTC3122HMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3122HMSE#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 LTC3122HMSE#TRPBF reliable?
The price and inventory of LTC3122HMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3122HMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3122HMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3122HMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3122HMSE#TRPBF?
LTC3122HMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3122HMSE#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 LTC3122HMSE#TRPBF?
For technical support, including LTC3122HMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3122HMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3122HMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3122HMSE#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 LTC3122HMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3122HMSE#TRPBF?
All LTC3122HMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3122HMSE#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 LTC3122HMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3122HMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3122HMSE#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…
