DC1832A Internal Power Switch Buck Regulators by Analog Devices

Internal Power Switch Buck Regulators
Status: Production
Series: LT3995
RoHS: Compliant
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The LT3995 is an adjustable frequency monolithic buck switching regulator that accepts a wide input voltage range up to 60V. Low quiescent current design consumes only 2.7μA of supply current while regulating with no load. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping the output ripple below 15mV in a typical application. The LT3995 can supply up to 3A of load current and has current limit foldback to limit power dissipation during short circuit. A low dropout voltage of 500mV is maintained when the input voltage drops below the programmed output voltage, such as during automotive cold crank.An internally compensated current mode topology is used for fast transient response and good loop stability. A high efficiency 85mΩ switch is included on the die along with a boost Schottky diode and the necessary oscillator, control, and logic circuitry. An accurate 1.02V threshold enable pin can be driven directly from a microcontroller or used as a programmable undervoltage lockout. A capacitor on the SS pin provides a controlled inrush current (soft-start). A power good flag signals when VOUT reaches 91.6% of the programmed output voltage. The LT3995 is available in a small 16-lead MSOP package with exposed pad for low thermal resistance.

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Features

Ultralow Quiescent Current: 2.7μA IQ at 12VIN to 3.3VOUT 
Low Ripple Burst Mode® Operation Output Ripple < 15mVP-P 
Wide Input Range: Operation from 4.3V to 60V 
3A Maximum Output Current 
Excellent Start-Up and Dropout Performance 
Adjustable Switching Frequency: 200kHz to 2MHz 
Synchronizable Between 250kHz to 2MHz 
Accurate Programmable Undervoltage Lockout 
Low Shutdown Current: IQ = 700nA 
Power Good Flag 
Soft-Start Capability 
Thermal Shutdown Protection 
Current Limit Foldback with SS Override 
Saturating Switch Design: 85mΩ On Resistance 
Small, Thermally Enhanced 16-Lead MSOP Package
AEC-Q100 Qualified for Automotive Applications

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Alternative Descriptions

LT3995 Demo Board ? 60V, 3A, 2 | Analog Devices
DEMO BOARD | Richardson RFPD

DC1832A Development Boards & Evaluation Kits by Linear Technology

DEMO BOARD STEP DOWN REGULATOR

Education Maker & Hobbyist Electronics>Development Boards & Evaluation Kits>Power Management Development Kits
Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock
Demonstration circuit 1832A is a monolithic step-down DC/DC switching regulator featuring the LT3995. The LT3995 is a compact, high efficiency monolithic step-down switching regulator that consumes only 2.7μA of quiescent current. The demo circuit is designed for 3.3V, 3A output from a 4.3V to 60V input. The switching frequency can be programmed either via oscillator resistor or external clock up to 2MHz. To synchronize to an external clock, move JP2 to SYNC and apply the external clock to the SYNC turret. The RT resistor (R5) should be chosen to set the LT3995 internal switching frequency at least 20% below the lowest synchronization input frequency. Low ripple Burst Mode® operation increases the efficiency at the light load while keeping the output ripple below 15mV. The SYNC pin on the demo board is grounded by default by setting JP2 at RT FREQ for low ripple Burst Mode operation. Figure 1 shows the demo board efficiency at 12V input voltage. The LT3995 is in shutdown when the EN pin is low and active when the pin is high. The threshold of the EN pin is accurate at 1.02V with 60mV of hysteresis. Users can populate R7 and R8 to provide a programmable under The demo board has an EMI filter installed. The EMI performance of the demo board at 12V input voltage is shown on Figure 2. The limit in Figure 2 is EN55022 Class B. The figure shows the circuit passes the test with a wide margin. To use the EMI filter, the input should be tied to VEMI not VIN. The LT3995 data sheet gives a complete description of the part, operation and application information. The data sheet must be read in conjunction with this demo manual for demo circuit 1832A. The LT3995 is assembled in a 16lead plastic MSOP package with an exposed pad for low thermal resistance. Proper board layout is essential for both proper operation and maximum thermal performance. See the data sheet sections for details.

Features

Specifications

Silicon Manufacturer Linear Technology
Silicon Core Number LT3995
Kit Application Type Power Management - Voltage Regulator
Application Sub Type Step Down Switching Regulator
Kit Contents Demonstration Board LT3995
Product Range -
Automotive Qualification Standard -
SVHC No SVHC (15-Jan-2018)
Features Compact High Efficiency Supply Current 2.7µA Output of 3.3V/3A Input Supply of 4.3V to 60V

Frequently Asked Questions

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What category does DC1832A fall under?

The DC1832A is listed under Internal Power Switch Buck Regulators.

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Is the DC1832A RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Analog Devices.

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