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Analog Devices Inc. LTC3290EMSE#PBF
- Part No.:
- LTC3290EMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3290EMSE#PBF.pdf
- Description:
- IC REG BOOST ADJ 50MA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,851
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Product details
Overview
LTC3290EMSE#PBF from Analog Devices is a high-voltage boost charge pump IC supporting 4.5V to 55V input and auxiliary supply ranges, delivering up to 50mA output current with 15µA VIN quiescent current and hysteretic Burst Mode operation. It operates in two configurable modes: standard boost (VOUT ≤ VIN + VAUX) or VIN-tracking mode (VOUT = VIN + fixed offset), enabling high-side N-FET driver supplies and industrial power switching rails.
For engineers reviewing the LTC3290EMSE#PBF datasheet, LTC3290EMSE#PBF pinout, LTC3290EMSE#PBF application, or LTC3290EMSE#PBF equivalent, key selection criteria include input voltage range compatibility (4.5–55V), VSET-configurable regulation mode, PGOOD open-drain status signaling, thermal protection behavior, and MSOP-10 exposed-pad thermal performance under load.
Technical Context
The LTC3290EMSE#PBF implements a 250kHz fixed-frequency switched-capacitor boost architecture using external flying capacitor C+ and C– terminals. Its internal logic supports dual regulation schemes: FB-based voltage setting (1V reference) in boost mode or current-mirror-based offset programming via VSET/FB resistors in VIN-tracking mode.
It integrates reverse input protection to –55V, short-circuit current limiting (150mA typ), thermal shutdown at ~175°C, and PGOOD monitoring with mode-specific thresholds (95–98% of regulation voltage in boost; ±1.5V offset in tracking). The BIAS pin provides a stable 4.5V internal supply for internal circuitry and requires a 4.7µF ceramic bypass.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 55V on both VIN and VAUX pins - enables wide-range industrial and automotive battery-supplied systems. |
| Max Output Current | 50mA continuous - sufficient for gate driving high-side N-FETs or biasing analog front-ends. |
| VIN Quiescent Current | 15µA typical in Burst Mode - minimizes standby power in always-on systems. |
| Output Regulation Accuracy | ±2% over temperature (FB = 0.98–1.02V) - ensures stable rail generation without trimming. |
| Effective Open-Loop Resistance | 65Ω typical - determines maximum available load current per IOUT = (VIN + VAUX − VOUT)/ROL. |
| Thermal Shutdown Threshold | ~175°C junction - protects against sustained overload while allowing momentary peak loads. |
| PGOOD Accuracy | Rising threshold 95–98% of final VOUT in boost mode - provides reliable power-good assertion for system sequencing. |
Pinout & Package
The LTC3290EMSE#PBF is housed in a thermally enhanced 10-pin MSOP package with an exposed GND pad (Pin 11) that must be soldered to the PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VAUX (1) | Auxiliary input supply | Provides second high-voltage source for charge pump energy transfer; must be bypassed with ≥10µF ceramic capacitor. |
| EN (2) | Enable logic input | Active-high control (1.1–2V threshold); floating prohibited - ties directly to microcontroller GPIO or system enable rail. |
| C+ (3), C– (4) | Flying capacitor terminals | Switch high-frequency charge between VAUX and VIN/VOUT paths; require low-ESR ceramic capacitor (≥1µF recommended). |
| VIN (5) | Main input supply | Primary power source; supports reverse polarity protection to –55V - suitable for harsh automotive environments. |
| BIAS (6) | Internal bias voltage output | 4.5V regulated supply for internal circuitry; requires dedicated 4.7µF ceramic bypass to GND - not for external loading. |
| PGOOD (7) | Open-drain power-good indicator | Signals regulation status; requires external pull-up ≤3.6V - used for MCU reset sequencing or fault logging. |
| FB (8) | Feedback reference input | Serves 1V reference node; sets output voltage in boost mode or generates reference current in tracking mode. |
| VSET (9) | Tracking mode configuration | Grounded for boost mode; connected to VOUT via resistor in tracking mode to program fixed VIN offset. |
| VOUT (10) | Regulated output voltage | Delivers boosted or tracked output; bypassed to GND (boost) or VIN (tracking) with low-ESR ceramic capacitor. |
| GND (11) | Power and signal ground | Exposed thermal pad - mandatory connection to PCB ground plane for θJA = 45°C/W thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Wide dual-input voltage support | Independent 4.5–55V ranges on VIN and VAUX - eliminates need for pre-regulation in multi-rail systems. |
| VIN-tracking regulation | Programmable offset above VIN using external R1/R2 - enables battery-following supplies (e.g., VOUT = VBAT + 10V). |
| Hysteretic Burst Mode operation | Reduces quiescent current to 15µA at light loads - extends battery life in intermittent-use applications. |
| Integrated protection suite | Reverse input protection (–55V), short-circuit current limit (150mA), and thermal shutdown - reduces external protection component count. |
| Stable with ceramic capacitors only | No requirement for tantalum or electrolytic bulk caps - improves reliability and reduces board area. |
Applications
| High-Side N-FET Driver Supply | VIN-Tracking Battery Bias Rail |
|---|---|
Use Scenario: Driving gate of high-side N-channel MOSFET in buck or half-bridge converter where gate voltage must exceed source voltage. IC Role / Device Role / Timing Role: Generates VGS > VDS(off) rail referenced to switch node; regulates VOUT = VIN + offset during dynamic load transitions. Use Value: Enables efficient high-side switching without isolated bias windings or bootstrapping limitations - supports 42V automotive systems. | Use Scenario: Providing stable analog supply for sensor interface or ADC reference in vehicle battery systems with wide VBAT swing (9–16V). IC Role / Device Role / Timing Role: Tracks battery voltage with fixed +10V offset; maintains constant headroom for downstream LDOs or op-amps. Use Value: Eliminates need for wide-input LDOs; preserves PSRR and noise immunity across full battery range. |
| Industrial High-Voltage Auxiliary Rail | Automotive Load Disconnect Control |
Use Scenario: Generating 24–42V bias for industrial PLC I/O modules or field transmitters powered from 24V DC bus. IC Role / Device Role / Timing Role: Boosts 24V input to 42V using 12V auxiliary supply; delivers 50mA with <1% ripple in Burst Mode. Use Value: Replaces inductor-based converters in space-constrained enclosures - no EMI filtering required. | Use Scenario: Controlling high-current load disconnect in automotive body control modules with inrush current limiting and fault isolation. IC Role / Device Role / Timing Role: Supplies gate drive for series N-FET; PGOOD signals ready state to MCU before enabling main load path. Use Value: Integrates sequencing, protection, and status feedback - reduces BOM count vs discrete FET + driver + supervisor solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage charge pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3261IMSE#PBF | Inverting topology; 4.5–32V input; 100mA output; no VIN-tracking mode. | Generates negative rail instead of positive boost; lacks VSET-programmable tracking capability. | Select when negative bias (e.g., op-amp dual supply) is needed instead of positive high-side rail. |
| LTC3256EFE#PBF | Wide-input (5.5–38V), dual-output (350mA step-down + 50mA boost), integrated watchdog timer. | Provides complementary step-down rail alongside boost; adds system-level supervision not present in LTC3290EMSE#PBF. | Choose for complex multi-rail systems requiring coordinated power sequencing and fault recovery. |
Compared with LTC3261IMSE#PBF and LTC3256EFE#PBF, the LTC3290EMSE#PBF uniquely supports VIN-tracking mode and dual independent high-voltage inputs (up to 55V each), making it optimal for battery-following and high-ratio boost applications where inverting or dual-rail functionality is unnecessary.
Availability
LTC3290EMSE#PBF is available at Aetrix Electronics and suitable for high-side N-FET driver supplies, automotive battery-tracking rails, and industrial 24V-to-42V auxiliary power conversion requiring stable component supply across extended temperature and voltage ranges.
Supply support for LTC3290EMSE#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and automotive markets.
The LTC3290 product line delivers high-voltage switched-capacitor power conversion for applications demanding wide input range, low quiescent current, and programmable regulation modes - specifically targeting automotive and industrial systems with stringent reliability and thermal requirements.
FAQ
What is the maximum allowable voltage difference between VIN and VAUX on the LTC3290EMSE#PBF?
The absolute maximum rating specifies VIN to VAUX differential voltage as 60V. This allows asymmetric operation - for example, VIN = 12V and VAUX = 55V - provided neither exceeds its individual 4.5–55V range and their sum does not exceed 55V in regulation. Exceeding 60V differential risks permanent damage per Absolute Maximum Ratings table.
Can the LTC3290EMSE#PBF operate with only one input supply?
No - the LTC3290EMSE#PBF requires both VIN and VAUX to be present and within 4.5–55V for normal operation. The charge pump architecture relies on energy transfer between these two supplies; omitting either disables regulation. VAUX may be tied to VIN only if total current demand remains within combined supply capability and thermal limits.
How does the PGOOD pin behave differently in boost versus VIN-tracking mode on the LTC3290EMSE#PBF?
In boost mode (VSET = GND), PGOOD asserts high-Z when VOUT reaches 95–98% of its programmed value. In VIN-tracking mode, PGOOD uses absolute voltage thresholds: rising at VOUT − VIN = +1.5V and falling at +1.6V offset. This ensures accurate sequencing regardless of VIN variation - critical for battery-following applications where relative offset matters more than absolute VOUT.
What is the minimum recommended flying capacitor value for full 50mA output on the LTC3290EMSE#PBF?
Analog Devices specifies ≥1µF ceramic capacitor for CFLY to support full 50mA output current. Smaller values (e.g., 0.2µF) reduce available current due to increased effective open-loop resistance (ROL); Figure 4 shows ROL rises with temperature and smaller CFLY. X5R/X7R dielectrics are preferred for stable capacitance across voltage and temperature.
Is the LTC3290EMSE#PBF qualified for automotive applications, and what grade does this part number represent?
Yes - the LTC3290EMSE#PBF is rated for –40°C to +125°C operating junction temperature and is AEC-Q100 qualified for automotive applications. Per the Order Information table, the "E" grade denotes commercial/industrial temperature range, but the device itself meets AEC-Q100 stress testing requirements. For production automotive use, Analog Devices recommends the #W-suffixed variants (e.g., LTC3290HMSE#WPBF) with controlled manufacturing flow.
LTC3290EMSE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) 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):
- 4.5V
- Voltage - Input (Max):
- 55V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 55V
- Current - Output:
- 50mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LTC3290EMSE#PBF FAQ
1.How can I place an order for LTC3290EMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3290EMSE#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 LTC3290EMSE#PBF reliable?
The price and inventory of LTC3290EMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3290EMSE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3290EMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3290EMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3290EMSE#PBF?
LTC3290EMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3290EMSE#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 LTC3290EMSE#PBF?
For technical support, including LTC3290EMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3290EMSE#PBF requirements.
6.How does Aetrix verify that LTC3290EMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3290EMSE#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 LTC3290EMSE#PBF meets industry standards.
7.What is the process for return or replacement of LTC3290EMSE#PBF?
All LTC3290EMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3290EMSE#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 LTC3290EMSE#PBF part is unused and in its original packaging.
Return procedure for LTC3290EMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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