Micrel
MIC2172/3172
Typical Characteristics MIC3172 (cont)
Parameter
Oscillator Section
Frequency (f
O
)
Duty Cycle [δ(max)]
Sync Coupling Capacitor
Required for Frequency
Lock
Minimum Operating
Voltage
Quiescent Current (I
Q
)
Supply Current Increase
(∆I
IN
)
Enable Input Threshold
Enable Input Current
V
EN
= 0V
V
EN
= 2.4V
3V
≤
V
IN
≤
40V, V
COMP
= 0.6V, I
SW
= 0
∆I
SW
= 1A, V
COMP
= 1.5V
0.4
–1
V
PP
= 3.0V
V
PP
= 40V
88
85
80
22
2.2
100
89
51
4.7
112
115
95
120
10
kHz
kHz
%
pF
pF
Condition
Min
Typ
Max
Units
Input Supply Voltage Section and Enable Section
2.7
7
9
1.2
0
2
3.0
9
20
2.4
1
10
V
mA
mA
V
µA
µA
Bold
type denotes specifications applicable to the full operating temperature range.
Note 1.
Devices are ESD sensitive. Handling precautions required.
Note 2.
For duty cycles (δ) between 50% and 95%, minimum guaranteed switch current is given by I
CL
= 0.833 (2-
δ)
for the MIC3172.
Note 3.
Specification for packaged product only.
April 2006
6
M9999-041806
(408) 955-1690
MICREL [ MICREL SEMICONDUCTOR ]
