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Analog Devices Inc. LT3995HMSE#TRPBF
- Part No.:
- LT3995HMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT3995HMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 3A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,451
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Product details
Overview
LT3995HMSE#TRPBF from Analog Devices is a monolithic 60V, 3A synchronous step-down switching regulator with current-mode control, 2.7µA quiescent current, adjustable 200kHz–2MHz switching frequency, and AEC-Q100 H-grade (–40°C to +150°C) qualification for automotive cold-crank battery regulation.
For engineers reviewing the LT3995HMSE#TRPBF datasheet, LT3995HMSE#TRPBF pinout, LT3995HMSE#TRPBF application, or LT3995HMSE#TRPBF equivalent, this page delivers verified technical context on ultralow-IQ operation, dropout performance at 500mV, Burst Mode ripple control (<15mVP-P), soft-start implementation, and thermal derating behavior in automotive-grade MSOP-16EP packaging.
Technical Context
The LT3995HMSE#TRPBF employs an internally compensated current-mode architecture with fast transient response and stable loop behavior across temperature. Its bipolar NPN power switch features 85mΩ RDS(on) and integrates a boost Schottky diode, oscillator, error amplifier, and VC-clamped current limit with foldback.
Operation includes low-ripple Burst Mode (quiescent current = 2.7µA at no load), programmable UVLO via EN pin (1.02V threshold), power-good flag (91.6% VOUT trip), and thermal shutdown protection. Dropout mode maintains regulation down to (VIN – VOUT) = 500mV with active boost capacitor charging to sustain switch saturation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.3V to 60V - supports automotive battery transients including cold-crank (≥4.3V startup) and load-dump immunity. |
| Output Current | Up to 3A - limited by internal current foldback (3.1A at VFB = 0V) and thermal derating above 125°C junction. |
| Quiescent Current | 2.7µA at no load - enables >10-year battery life in always-on automotive modules (e.g., telematics, ADAS sensors). |
| Switching Frequency | 200kHz to 2MHz - set by RT resistor; synchronizable 250kHz–2MHz; enables compact magnetics (e.g., 8.2µH @ 300kHz). |
| Feedback Reference | 1.197V ±1.2% - high-accuracy reference enables ±1.5% output voltage tolerance with 1% resistors. |
| Dropout Voltage | 500mV - enforced minimum (VIN – VOUT) ensures regulation during brownout while sustaining boost capacitor charge. |
| Package Thermal Resistance | θJA = 40°C/W - exposed pad (Pin 17) must be soldered to PCB copper for automotive-grade thermal management. |
Pinout & Package
LT3995HMSE#TRPBF is housed in a thermally enhanced 16-lead plastic MSOP package with exposed pad (Pin 17 = GND), rated for –40°C to +150°C junction temperature and qualified per AEC-Q100 Grade H.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (Pin 1) | Feedback input | Regulates to 1.197V; connects to resistor divider tap; requires 10pF phase-lead cap to VOUT for stability. |
| SS (Pin 2) | Soft-start control | Internal 1.8µA pull-up charges external capacitor; actively discharged during shutdown/UVLO/thermal fault. |
| OUT (Pin 3) | Boost diode anode / dropout sense | Connects to output when VOUT < 16V; supplies bias current to internal regulator if VOUT > 3.2V. |
| BOOST (Pin 4) | Bootstrap drive | Drives internal bipolar switch; requires external capacitor referenced to SW; min. 1.3V boost voltage required. |
| SW (Pins 5–7) | Power switch output | Three paralleled pins for low-inductance connection to inductor, catch diode, and boost capacitor. |
| VIN (Pins 10–12) | Main supply input | Supplies internal circuitry and switch; must be locally bypassed with low-ESR ceramic capacitors. |
| EN (Pin 13) | Enable control | Hysteretic threshold: 1.02V (falling), 1.08V (rising); accurate UVLO programming when VIN ≥ 4.3V. |
| RT (Pin 14) | Frequency programming | Resistor to GND sets fSW; 11.8kΩ → 2.25MHz, 294kΩ → 160kHz; supports sync input on Pin 16. |
| PG (Pin 15) | Power-good flag | Open-drain output active low until VFB reaches 91.6% of target; valid only when VIN > 2V. |
| SYNC (Pin 16) | External clock input | Ground for Burst Mode; tie to external clock (250kHz–2MHz) for pulse-skipping; floating prohibited. |
| GND (Pin 17) | Thermal & signal ground | Exposed pad; must be soldered to PCB thermal plane for θJA = 40°C/W and reliable 150°C operation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 2.7µA at no load enables multi-year battery operation in always-on automotive systems without compromising regulation. |
| Low-ripple Burst Mode | Maintains output ripple <15mVP-P with two 47µF ceramic capacitors-critical for noise-sensitive analog/sensor rails. |
| AEC-Q100 Grade H qualification | Guaranteed operation from –40°C to +150°C junction temperature with full electrical characterization and reliability testing. |
| Current limit foldback | Reduces switch current to 3.1A during short-circuit, limiting power dissipation and enabling safe thermal recovery. |
| Accurate programmable UVLO | EN pin threshold (1.02V) allows precise system-level undervoltage detection-e.g., disable downstream logic before battery collapse. |
| Integrated boost Schottky diode | Eliminates external boost diode; reduces BOM count and layout area while maintaining low forward drop (800mV @ 100mA). |
Applications
| Automotive Battery Regulation | ADAS Sensor Power Supply |
|---|---|
|
Use Scenario: Regulating 12V automotive battery (4.5V–16V during cranking) to 3.3V/5V for radar, camera, or LiDAR modules. IC Role / Device Role / Timing Role: Primary buck converter delivering stable, low-noise power under wide VIN transients and extreme ambient temperatures. Use Value: 500mV dropout and 2.7µA IQ ensure continuous operation during cold-crank (≤4.5V) and preserve battery life in parked state. |
Use Scenario: Powering image sensor and ISP in automotive camera ECU with strict EMI and ripple requirements. IC Role / Device Role / Timing Role: Low-ripple, synchronized buck regulator supplying clean 1.8V/3.3V rails with Burst Mode enabled below 90mA. Use Value: <15mVP-P ripple at light load and 2MHz sync capability minimize conducted emissions into sensitive analog front-ends. |
| Industrial IoT Edge Node | Telematics Control Unit (TCU) |
|
Use Scenario: Long-life remote monitoring node powered by primary lithium battery (3.6V nominal) with solar trickle charge. IC Role / Device Role / Timing Role: High-efficiency step-down regulator converting 4.3V–60V input (solar/battery/hybrid) to 3.3V microcontroller rail. Use Value: 2.7µA IQ extends battery runtime beyond 10 years; wide VIN accommodates variable solar input without external pre-regulator. |
Use Scenario: Power management for cellular/V2X modem, GNSS receiver, and CAN controller in vehicle connectivity module. IC Role / Device Role / Timing Role: Main 3.3V/5V power source with PG flag for system reset coordination and thermal derating awareness. Use Value: Power-good signaling (91.6% trip) enables safe firmware boot sequencing; thermal shutdown protects against enclosure overheating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3639EMSE#PBF | 40V max VIN, 2A output, 1.2µA IQ, fixed 1.2V/1.5V/1.8V/2.5V/3.3V outputs; no adjustable frequency or SYNC. | Better IQ but lower voltage rating and no programmability; suited for fixed-rail, ultra-low-power non-automotive use. | Select LTC3639EMSE#PBF only if fixed output and sub-2µA IQ outweigh need for 60V rating, 3A capability, or frequency tuning. |
| MPQ4433AGL-AEC1-P | 60V max VIN, 3.5A output, 17µA IQ, AEC-Q100 Grade 1 (–40°C to +125°C); no PG flag or SS override. | Higher current but 6× higher IQ; lacks power-good signaling and soft-start override for overload recovery. | Choose MPQ4433AGL-AEC1-P only when peak current >3A is mandatory and 17µA IQ is acceptable for battery-backed systems. |
Compared with LTC3639EMSE#PBF and MPQ4433AGL-AEC1-P, LT3995HMSE#TRPBF uniquely balances 60V/3A capability, 2.7µA IQ, AEC-Q100 Grade H, and comprehensive protection (PG, SS override, foldback) for demanding automotive power nodes.
Availability
LT3995HMSE#TRPBF is available at Aetrix Electronics and suitable for automotive battery regulation, ADAS sensor power supplies, and industrial IoT edge nodes requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LT3995HMSE#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 ICs, serving automotive, industrial, and communications markets with robust, precision-engineered solutions.
The LT3995 belongs to Analog Devices' automotive-qualified monolithic buck regulator family, designed specifically for harsh-environment power conversion where ultralow quiescent current, wide input range, and guaranteed high-temperature operation are mandatory.
FAQ
What is the maximum junction temperature specification for LT3995HMSE#TRPBF?
The LT3995HMSE#TRPBF is AEC-Q100 Grade H qualified with guaranteed operation from –40°C to +150°C junction temperature. Its thermal resistance is θJA = 40°C/W when the exposed pad (Pin 17) is properly soldered to PCB copper. Derating begins above 125°C junction, and continuous operation above 150°C may impair reliability.
How does LT3995HMSE#TRPBF achieve 2.7µA quiescent current in Burst Mode?
The LT3995HMSE#TRPBF achieves 2.7µA quiescent current by entering low-ripple Burst Mode at light loads: it delivers discrete current pulses to the output capacitor, then shuts down all control circuitry during sleep periods consuming only 1.7µA. Total IQ reaches 2.7µA in typical 3.3V/12V applications due to feedback resistor and diode leakage minimization.
Can LT3995HMSE#TRPBF operate with input voltage below 4.3V?
No-LT3995HMSE#TRPBF has a minimum operating input voltage of 4.3V per datasheet specifications. Below this, internal UVLO forces shutdown regardless of EN pin state. During automotive cold-crank, the part remains functional down to 4.3V; operation below that requires external pre-bias or hold-up circuitry.
What is the purpose of the OUT pin on LT3995HMSE#TRPBF?
The OUT pin on LT3995HMSE#TRPBF serves three functions: (1) it connects to the anode of the internal boost Schottky diode, (2) it feeds the dropout comparator to enforce 500mV minimum (VIN – VOUT), and (3) it supplies bias current to the internal regulator when VOUT > 3.2V-improving efficiency by reducing VIN current draw.
Is LT3995HMSE#TRPBF pin-compatible with other LT3995 variants like LT3995EMSE#TRPBF?
Yes-LT3995HMSE#TRPBF shares identical pinout, footprint, and electrical interface with LT3995EMSE#TRPBF and LT3995IMSE#TRPBF. The sole difference is the guaranteed operating temperature range: H-grade (–40°C to +150°C) vs. E/I-grade (–40°C to +125°C). No PCB changes are required for upgrade.
LT3995HMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.3V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1.197V
- Voltage - Output (Max):
- 55.8V
- Current - Output:
- 3A
- Frequency - Switching:
- 200kHz ~ 2.25MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT3995HMSE#TRPBF FAQ
1.How can I place an order for LT3995HMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3995HMSE#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 LT3995HMSE#TRPBF reliable?
The price and inventory of LT3995HMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3995HMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3995HMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3995HMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3995HMSE#TRPBF?
LT3995HMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3995HMSE#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 LT3995HMSE#TRPBF?
For technical support, including LT3995HMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3995HMSE#TRPBF requirements.
6.How does Aetrix verify that LT3995HMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3995HMSE#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 LT3995HMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3995HMSE#TRPBF?
All LT3995HMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3995HMSE#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 LT3995HMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT3995HMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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