MIC26950 MICREL, MIC26950 Datasheet - Page 5

• Manufacturer Part Number: MIC26950
• Description: 12A Hyper Speed Control Synchronous DC-DC Buck Regulator
• Manufacturer: MICREL

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Micrel, Inc.
Electrical Characteristics
PV
Notes:
6.
7.
Parameter
Oscillator
Switching Frequency
Maximum Duty Cycle
Minimum Duty Cycle
Minimum Off-Time
Soft-Start
Soft-Start Time
Short-Circuit Protection
Current-Limit Threshold
Short-Circuit Current
Internal FETs
Top-MOSFET R
Bottom-MOSFET R
SW Leakage Current
V
Thermal Protection
Over-temperature Shutdown
Over-temperature Shutdown
Hysteresis
September 2010
IN
IN
Measured in test mode.
The maximum duty-cycle is limited by the fixed mandatory off-time t
Leakage Current
= V
IN
= 12V, V
DS (ON)
DD
DS (ON)
= 5V; V
(6)
(7)
BST
– V
SW
(5)
T
Condition
V
V
V
V
I
I
PV
PV
= 5V; T
SW
SW
J
FB
FB
FB
FB
Rising
IN
IN
= 1A
= 1A
= 0V
> 0.8V
= 0.8V
= 0V
= 26V, V
= 26V, V
A
= 25°C, unless noted. Bold values indicate −40°C ≤ T
SW
SW
= 26V, V
= 0V, V
EN
OFF
EN
= 0V, V
of typically 360ns.
= 0V, V
5
BST
BST
= 31.5V
= 31.5 V
Min.
13.2
225
J
≤ +125°C.
Typ.
300
360
155
87
27
17
10
0
6
8
6
M9999-091710-C
Max.
375
60
25
MIC26950
Units
kHz
mΩ
mΩ
ms
µA
µA
ns
°C
°C
%
%
A
A