Wide Input Voltage Range, 1.3MHz, Buck Regulator


The SP7653 is a synchronous step-down switching regulator optimized for high efficiency. The part is designed to be especially attractive for dual supply, 12V to 20V distributed power systems stepped-down with 5V used to power the controller. This lower VCC voltage minimizes power dissipation in the part and is used to drive the top switch. The SP7653 is designed to provide a fully integrated buck regulator solution using a fixed 1.3MHz frequency, PWM voltage mode architecture. Protection features include UnderVoltage Lock Out (UVLO), thermal shutdown and output short-circuit protection. The SP7653 is available in the space saving DFN package.

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  • 2.5V to 20V step-down achieved using dual input
  • Output voltage down to 0.8V
  • 3A output capability
  • Built in low RDSON power switches (40 mΩ typical)
  • Highly integrated design, minimal components
  • 1.3MHz fixed frequency operation
  • UVLO detects both VCC and VIN
  • Over temperature protection
  • Short-circuit protection with auto restart
  • Wide BW Amp allows type II or III compensation
  • Programmable soft-start
  • Fast transient response
  • High efficiency: greater than 95% possible
  • Nonsynchronous start up into a pre-charged output
  • Small 7mm x 4mm DFN package


Spice Models - OrCAD

Orcad Spice Model

Spice Models - Generic

Generic Spice Model

Product Brochure

Power Management Brochure


Design Tools

Simulation Models
Reference Designs


Pkg Code Details Quantities Dimensions PDF
DFN26 7x4
  • JEDEC Reference: n/a
  • MSL Pb-Free: L3 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 36ºC/W
  • Bulk Pack Style: Canister
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 3000
  • Quantity per Tube: n/a
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 16 x 8
  • Tape & Reel Unit Orientation: Pin 1 at sprocket hole
  • Dimensions: mm
  • Length: 7
  • Width: 4
  • Thickness: 0.9
  • Lead Pitch: 0.5

Parts & Purchasing

Part Number Pkg Code RoHS Min Temp Max Temp Status Buy Now Order Samples
SP7653ER DFN26 7x4 -40 85 OBS
SP7653ER/TR DFN26 7x4 -40 85 OBS
SP7653ER-L DFN26 7x4 -40 85 OBS Suggested:
SP7653ER-L/TR DFN26 7x4 -40 85 OBS Suggested:
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Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
Distribution Date Description File
07/20/2015 Product discontinuation notification PDN_15-0105-01-1033.pdf
10/16/2013 Qualified PPF (NiPdAu) lead termination finish in assembly to replace matte-tin plating. Material change. PCN_13-0936-01-1033.pdf
10/04/2013 Addition of an alternate qualified assembly site, UTAC Thailand, for assembly using copper or gold wire bonding. Material change and alternate assembly site. PCN_13-0522-04-1033.pdf
02/28/2007 Product Obsolescence Letter and Discontinuation Notification. Discontinued. POL_022807-1033.pdf