MIC2155_0911 Datasheet, PDF (7/35 Pages) Micrel Semiconductor – Two-Phase, Single-Output, PWM Synchronous Buck Control IC

Micrel, Inc.
MIC2155/2156
Electrical Characteristics⁽³⁾ cont.
T_J = 25°C; V_EN = V_IN1 = V_IN2 =12V; unless otherwise specified. Bold values indicate -40°C≤T_J≤+125°C
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 ≤ V_IN ≤ 14.5
0.08
%
Output Voltage Load
Regulation
0.5
%
Output Voltage Total
Regulation
Channel Current Balancing
4.5V ≤ V_IN ≤ 14.5V; 1A ≤ I_OUT ≤ 10A
(V_OUT = 2.5V)
0.6
%
Asynchronous Mode V_TH 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
V_FB Threshold
Delay Blanking time
(Latches LSD High)
106 109
1
114 %Nom
µs
Soft Start
Internal Soft-Start Source
Current
1.25
1
2
2.75
3
µA
November 2009
7
M9999-111209-B