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See Technical Specifications

LT3685EMSE#PBF

36V, 2A, 2.4MHz Step-Down Switching Regulator

Manufacturer:

ADI
Mfr.Part #:

LT3685EMSE#PBF
Datasheet:

LT3685EMSE#PBF Datasheet (PDF)
Pbfree Code:

No
Part Life Cycle Code:

Active
Pin Count:

10
Reach Compliance Code:

compliant
EDA/CAD Models:

Request Free CAD Models for LT3685EMSE#PBF

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LT3685EMSE#PBF General Description

The LT3685 is an adjustable frequency (200kHz to 2.4MHz) monolithic step-down switching regulator that accepts input voltages up to 38V operating and 60V maximum. An internal overvoltage protection circuit turns off the power switch when V_IN is above 38V typical (36V minimum) which then allows the part to safely withstand 60V transients. A high efficiency 0.25Ω switch is included on the die along with a boost Schottky diode and the necessary oscillator, control, and logic circuitry. Current mode topology is used for fast transient response and good loop stability. The LT3685’s high operating frequency allows the use of small, low cost inductors and ceramic capacitors resulting in low output ripple while keeping total solution size to a minimum. The low current shutdown mode reduces input supply current to less than 1μA while a resistor and capacitor on the RUN/SS pin provide a controlled output voltage ramp (soft-start). A power good ﬂag signals when V_OUT reaches 89% of the programmed output voltage. The LT3685 is available in 10-Pin MSOP and 3mm × 3mm DFN packages with exposed pads for low thermal resistance.

Key Features

Wide Input Range:
- Operation From 3.6V to 36V
- Overvoltage Lockout Protects Circuit through
- 60V Transients
2A Maximum Output Current
Adjustable Switching Frequency: 200kHz to 2.4MHz
Low Shutdown Current: I_Q < 1µA
Integrated Boost Diode
Synchronizable Between 250kHz to 2MHz
Power Good Flag
Saturating Switch Design: 0.25Ω On-Resistance
0.790V Feedback Reference Voltage
Output Voltage: 0.79V to 20V
Soft-Start Capability
Small 10-Pin Thermally Enhanced MSOP and (3mm x 3mm) DFN Packages

Application

Automotive Battery Regulation
Set Top Box
Distributed Supply Regulation
Industrial Supplies
Wall Transformer Regulation

Specifications

Source Content uid	LT3685EMSE#PBF	Pbfree Code	No
Part Life Cycle Code	Active	Pin Count	10
Reach Compliance Code	compliant	Analog IC - Other Type	SWITCHING REGULATOR
Control Mode	CURRENT-MODE	Control Technique	PULSE WIDTH MODULATION
JESD-30 Code	S-PDSO-G10	Moisture Sensitivity Level	1
Number of Functions	1	Number of Terminals	10
Peak Reflow Temperature (Cel)	260	Surface Mount	YES
Switcher Configuration	BOOST	Temperature Grade	OTHER
Terminal Finish	MATTE TIN	Terminal Form	GULL WING
Terminal Position	DUAL	Time@Peak Reflow Temperature-Max (s)	30