ZL2105

3A Integrated Digital DC-DC Converter

Product Status: Mass Production

OVERVIEW

The ZL2105 is an innovative power conversion and management IC that combines an integrated synchronous step-down DC-DC converter with key power management functions in a small package, resulting in a flexible and integrated solution. Zilker Labs Digital-DC™ technology enables unparalleled power management integration while delivering industry-leading performance in a tiny footprint.

The ZL2105 can provide an output voltage from 0.6 V to 5.5 V from an input voltage between 4.5 V and 14 V. Internal 4.5 A low RDS(ON) synchronous power MOSFETs enable the ZL2105 to deliver continuous loads up to 3 A with high efficiency, and an internal Schottky bootstrap diode further reduces discrete component count. The ZL2105 also supports phase spreading for reduced system capacitance.

Power management features such as digital soft-start delay and ramp, sequencing, tracking, and margining can be configured by simple pin-strapping or through an on- chip serial port. The ZL2105 uses standard PMBus™ protocol for communicating with other devices to provide intelligent system power management.

KEY FEATURES

    Power Conversion
  • High efficiency
  • 3 A continuous output current
  • Integrated MOSFET switches
  • 4.5 V to 14 V input range
  • 0.54 V to 5.5 V output range (with margin)
  • ±1% output voltage accuracy
  • 200 kHz to 2 MHz switching frequency
  • Supports phase spreading
  • Small footprint (6 x 6 mm QFN package)

  • Power Management
  • Digital soft start/stop
  • Precision delay and ramp-up
  • Power good/enable
  • Voltage tracking, sequencing, and margining
  • Output voltage/current monitoring
  • Thermal monitor w/ shutdown
  • Non-volatile memory
  • I2C/SMBus™ communication bus
  • PMBus compatible

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ZL2105
Basic Information
Production Status
Mass Production
Topology
Buck
# of Outputs
1
Input Voltage Min (V)
4.5
Input Voltage Max (V)
14
Output Voltage Min (V)
0.54
Output Voltage Max (V)
5.5
Output Current Max (A)
3
IQ
10 mA
Switching Freq. (max) (MHz)
1
Switching Freq. (min) (MHz)
0.2
Peak Efficiency (%)
92
POR
Yes
SYNCH Capability
Yes
Control Type
Digital
Qualification Level
Standard
Switching Frequency Range (MHz)
0.2 to 1.0
Temperature Range
-40 to +85

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