Microchip

LX7165
Demoboard LX7219

Topology: Buck
Input Voltage (min.): 3.00 V
Input Voltage (max.): 5.50 V
Output 1: 5.50 V / 5.000 A

Original publication on 2019-01-10, revision 0.1

Description

The LX7219 is a digitally controlled step-down regulator IC with an integrated 22mΩ high-side P-channel MOSFET and a 13mΩ low-side N-channel MOSFET. It features Microsemi’s proprietary constant-frequency hysteretic control engine for near-instantaneous correction to sudden line/load transients. It does not require high-ESR output capacitors and incorporates energy-saving “PSM” (Power Saving or Pulse Skip Mode) at light loads, to extend battery life in mobile applications.The LX7219 has an I2C serial interface port for output voltage margining and monitoring if required (it can operate in default mode too). It includes robust fault monitoring functions.The LX7219 will operate from 2.7V to 5.5V, and is available in several fixed output voltage options from 0.9V to 0.8V (no voltage divider is necessary). Each version’s output voltage can also be made adjustable with use of an external voltage divider.

Characteristics

  • Constant Frequency Hysteretic Control
  • Extremely Fast Line/Load Transient Response
  • I2C for Output Adjustment (3.4Mbps)
  • 1.2MHz Switching Frequency
  • Extremely Low-RDSON MOSFETS
  • Input Voltage Rail 2.6V to 5.5V, Current 6A
  • Programmable Power Save Mode for Light-Load Efficiency
  • UVLO, OVP, OCP
  • 0°C to +85°C Ambient Temperature
  • Available in WLCSP-20 (0.4mm pitch)
  • RoHS Compliant

Products

  Order Code SPEC Product series L
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Montageart Pins Reihen Gender Typ Verpackung C
(µF)
Tol. C VR
(V (DC))
Bauform H
(mm)
DF
(%)
Keramiktyp Technische Artikelnummer Endurance
(h)
Betriebstemperatur IRIPPLE
(mA)
RESR
(mΩ)
ILeak
(µA)
P
(mm)
Ø D
(mm)
L
(mm)
Samples
744373460033 PDF WE-LHMI SMT Power Inductor 0.33 13 38 3.5 3.9 124 SMT
61300411121 PDF WR-PHD 2.54 mm THT Pin Header 3 4 Single Pin Header Straight Bag
61300311121 PDF WR-PHD 2.54 mm THT Pin Header 3 3 Single Pin Header Straight Bag
885012107005 PDF WCAP-CSGP MLCCs 6.3 V(DC) 22 ±20% 6.3 0805 1.25 15 X5R Class II X5R0805226M6R3DFCT10000
870055674005 PDF WCAP-PTHR Aluminum Polymer Capacitors 47 35 12 PTEE115470M035DSPA7B000 2000 -55 °C up to +105 °C 2890 25 329 3.5 8 11.5