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PDF MIC23156 Data sheet ( Hoja de datos )
| Número de pieza | MIC23156 | |
| Descripción | 3MHz Synchronous Buck Regulator | |
| Fabricantes | Micrel Semiconductor | |
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MIC23156
1.5A, 3MHz Synchronous Buck Regulator
with HyperLight Load® and I2C Control for
Dynamic Voltage Scaling
General Description
The MIC23156 is a high-efficiency 1.5A synchronous buck
regulator with HyperLight Load® mode and dynamic
voltage scaling control through I2C. HyperLight Load
provides very high efficiency at light loads and ultra-fast
transient response. The ability to dynamically change the
output voltage and maintain high output voltage accuracy
make the MIC23156 perfectly suited for supplying
processor core voltages. An additional benefit of this
proprietary architecture is very low output ripple voltage
throughout the entire load range with the use of small
output capacitors. Fast mode plus I2C provides output
voltage and chip enable/disable control from standard I2C
bus with I2C clock rates of 100kHz, 400kHz, and 1MHz.
The MIC23156 is designed for use with 1µH, and an
output capacitor as small as 2.2µF that enables a total
solution size, less than 1mm in height.
The MIC23156 is available in both 16-ball, 0.4mm Pitch,
1.81mm x 1.71mm wafer level chip scale (WLCSP), and
17-pin 2.8mm x 2.5mm MLF® packages with an operating
junction temperature range of –40°C to +125°C.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Features
• Input voltage: 2.7V to 5.5V
• Up to 1.5A output current
• 1MHz I2C-controlled adjustable output
− VOUT = 0.7 to 2.4V in 10mV steps
• High output voltage accuracy (±1.5% over temperature)
• Fast pin–selectable output voltage
• Programmable soft-start using external capacitor
• Ultra-low quiescent current of 30µA when not switching
• Thermal-shutdown and current-limit protection
• Safe startup in to pre-biased output
• Stable with 1µH output inductor and 2.2µF ceramic
capacitor
• Up to 93% peak efficiency
• −40°C to +125°C junction temperature range
Applications
• Mobile handsets
• Solid state drives (SSD)
• WiFi/WiMx/WiBro modules
• Portable applications
Typical Application
HyperLight Load is a registered trademark of Micrel, Inc.
MLF and MicroLead Frame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
April 22, 2013
Revision 1.0
1 page  
Micrel, Inc.
MIC23156
Electrical Characteristics(4) (Continued)
TA = 25°C, AVIN = PVIN = VEN = VVI2C = 3.6V; L = 1.0µH; COUT = 2.2µF, unless otherwise specified.
Bold values indicate –40°C ≤ TJ ≤ +125°C, unless noted.
Parameter
Condition
Min.
Typ.
Max.
Units
Switch On-Resistance
Current Limit (DC Value)
Frequency
ISW = +100mA, High-Side Switch PMOS (MLF)
ISW = +100mA, High-Side Switch PMOS (WLCSP)
ISW = −100mA, Low-Side Switch NMOS (MLF)
ISW = −100mA, Low-Side Switch NMOS (WLCSP)
0.17
0.15
0.15
0.13
Ω
VOUT = 1V
1.7 2.9 5.1
A
3 MHz
Maximum Duty Cycle
Frequency = 3MHz
80 %
DVS Step Size
10 mV
Soft-Start Time
VOUT = 90%, CSS = 120pF
I2C Interface (Assuming 550pF Total Bus Capacitance)
250 µs
I2C Address
Read (Binary, Hex)
Write (Binary, Hex)
10110111, 0xB7
10110110, 0xB6
LOW-Level Input Voltage
SCL, SDA
0.3 × VI2C V
HIGH-Level Input Voltage
SCL, SDA
0.7 × VI2C
V
SDA Pull-Down Resistance
Power Good
Open drain pull-down on SDA during read back,
ISDA = 500µA
20
Ω
PGOOD Output Low
PGOOD Output Leakage
PGOOD Threshold
% of VOUT < VNOM
PGOOD hysteresis
VOUT < 80% VNOM, IPGOOD = −500µA
VOUT = VNOM
VOUT ramping up
100 mV
5 µA
86 96 %
5%
April 22, 2013
5
Revision 1.0
5 Page 
Micrel, Inc.
Functional Block Diagram
MIC23156
Figure 1. Simplified MIC23156 Functional Block Diagram
April 22, 2013
11
Revision 1.0
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet MIC23156.PDF ] | |
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