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MIC2155 Datasheet(PDF) 7 Page - Micrel Semiconductor

Part # MIC2155
Description  2-Phase, Single Output, PWM Synchronous Buck Control IC
Download  33 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC2155 Datasheet(HTML) 7 Page - Micrel Semiconductor

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Micrel, Inc.
MIC2155/2156
May 2009
7
M9999-052709-A
(408) 944-0800
Parameter
Condition
Min
Typ
Max
Units
Minimum On-Time
(each Channel) Note 4
30
ns
Regulation
CH1 Feedback Voltage
Reference
(+/- 1%)
(+/- 2%)
693
686
697
707
714
mV
CH1 Feedback Bias Current
VFB=0.7V
30
nA
Output Voltage Line
Regulation
4.5 ≤ VIN ≤ 14.5
0.08
%
Output Voltage Load
Regulation
0.5
%
Output Voltage Total
Regulation
4.5V
≤ VIN ≤ 14.5V; 1A ≤ IOUT ≤ 10A
(VOUT = 2.5V)
0.6
%
Channel Current Balancing
Asynchronous Mode VTH for
Slave Output
10
mV
Error Amplifier (CH1)
DC Gain
70
dB
Output Sourcing/Sinking
Current
1
mA
Error Amplifier (CH2)
DC Gain
70
dB
Transconductance
1.25
mS
Differential Amplifier
Voltage Gain
1
Offset Voltage
-20
+20
mV
Output Sourcing Current
Range
0
500
µA
Output Over Voltage Protection
VFB Threshold
(Latches LSD High)
106
109
114
%Nom
Delay Blanking time
1
µs
Soft Start
Internal Soft Start Source
Current
1.25
1
2
2.75
3
µA
Current Sense
CS Over Current Trip Point
Program Current
180
195
220
µA
CS Comparator Sense
Threshold
(Senses drop across low-side FET)
-10
0
+10
mV
Power Good
VFB threshold
86
88.5
91
%Nom


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