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ZL2105 반도체 회로 부품 판매점

3A Integrated Digital DC-DC Converter



Intersil Corporation 로고
Intersil Corporation
ZL2105 데이터시트, 핀배열, 회로
Data Sheet
3A Integrated Digital DC-DC Converter
Description
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.
ZL2105
www.DataSheet4U.com
February 18, 2009
FN6851.0
Features
Power Conversion
ƒ High efficiency
ƒ 3 A continuous output current
ƒ Integrated MOSFET switches
ƒ 4.5 V to 14 V input range
ƒ 0.54 V to 5.5 V output range (with margin)
ƒ ±1% output voltage accuracy
ƒ 200 kHz to 2 MHz switching frequency
ƒ Supports phase spreading
ƒ Small footprint (6 x 6 mm QFN package)
Power Management
ƒ Digital soft start/stop
ƒ Precision delay and ramp-up
ƒ Power good/enable
ƒ Voltage tracking, sequencing, and margining
ƒ Output voltage/current monitoring
ƒ Thermal monitor w/ shutdown
ƒ Non-volatile memory
ƒ I2C/SMBus™ communication bus
ƒ PMBus compatible
Applications
ƒ Telecom and storage equipment
ƒ Digital set-top box
ƒ Industrial supplies
ƒ 12 V distributed power systems
ƒ Point of load converters
Figure 1. Block Diagram
1 1-888-INTERSIL or 1-888-468-3774|Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2009. All Rights Reserved
All other trademarks mentioned are the property of their respective owners


ZL2105 데이터시트, 핀배열, 회로
ZL2105
Table of Contents
www.DataSheet4U.com
1. Electrical Characteristics ...............................................................................................................................................3
2. Pin Descriptions ............................................................................................................................................................6
3. Typical Application Circuit...........................................................................................................................................8
4. ZL2105 Overview .......................................................................................................................................................10
4.1 Digital-DC Architecture........................................................................................................................................10
4.2 Power Conversion Overview ................................................................................................................................11
4.3 Power Management Overview..............................................................................................................................12
4.4 Multi-mode Pins....................................................................................................................................................12
5. Power Conversion Functional Description..................................................................................................................13
5.1 Internal Bias Regulators and Input Supply Connections ......................................................................................13
5.2 High-side Driver Boost Circuit .............................................................................................................................13
5.3 Low-side Driver Supply Options ..........................................................................................................................13
5.4 Dual Input Supply Configuration..........................................................................................................................14
5.5 Output voltage Selection .......................................................................................................................................15
5.6 Start-up Procedure.................................................................................................................................................15
5.7 Soft Start Delay and Ramp Times.........................................................................................................................16
5.8 Switching Frequency and PLL..............................................................................................................................17
5.9 Component Selection ............................................................................................................................................19
5.10 Current Sensing and Current Limit Threshold Selection ....................................................................................22
5.11 Loop Compensation ............................................................................................................................................22
5.12 Non-linear Response (NLR) Settings..................................................................................................................23
5.13 Efficiency Optimized Drive Dead-time Control .................................................................................................24
6. Power Management Functional Description ...............................................................................................................24
6.1 Input Undervoltage Lockout .................................................................................................................................24
6.2 Power Good (PG) and Output Overvoltage Protection.........................................................................................25
6.3 Output Overvoltage Protection .............................................................................................................................25
6.4 Output Pre-Bias Protection ...................................................................................................................................25
6.5 Output Overcurrent Protection..............................................................................................................................26
6.6 Thermal Overload Protection................................................................................................................................26
6.7 Voltage Tracking...................................................................................................................................................27
6.8 Voltage Margining ................................................................................................................................................28
6.9 I2C/SMBus Communications ................................................................................................................................29
6.10 I2C/SMBus Device Address Selection ................................................................................................................29
6.11 Phase Spreading ..................................................................................................................................................29
6.12 Output Sequencing..............................................................................................................................................30
6.13 Monitoring via I2C/SMBus .................................................................................................................................31
6.14 Temperature Monitoring using the XTEMP Pin.................................................................................................31
6.15 Non-Volatile Memory and Device Security Features .........................................................................................32
7. Package Dimensions....................................................................................................................................................33
8. Ordering Information ..................................................................................................................................................34
9. Related Documentation ...............................................................................................................................................34
10. Revision History........................................................................................................................................................35
2 Data Sheet Revision 2/18/2009
www.intersil.com




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ZL2105 converter

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