MIC28510_12 Datasheet, PDF (10/30 Pages) Micrel Semiconductor – 75V/4A Hyper Speed Control Synchronous DC/DC Buck Regulator

Micrel, Inc.
Typical Characteristics (Continued)
Thermal Derating
4
Thermal Derating
4
3
VOUT = 1.2V
V_OUT = 1.8V
2
VIN = 12V
1 ^fSW ^{= 250kHz}
L = 10µH
Tj_MAX = 125°C
V_OUT = 0.8V
0
25
40
55
70
85
100
MAXIMUM AMBIENT TEMPERATURE
(°C)
3
VOUT =1.8V
VOUT = 1.2V
2
VIN = 18V
1 _{fSW = 250kHz}
L = 10µH
Tj_MAX = 125°C
VOUT = 0.8V
0
25
40
55
70
85
100
MAXIMUM AMBIENT TEMPERATURE
(°C)
MIC28510
Thermal Derating
4
3
V_OUT = 1.8V
2
V_OUT = 1.2V
V_IN = 24V
1 _{fSW = 250kHz}
L = 10µH
T_{j_MAX} = 125°C
V_OUT = 0.8V
0
25
40
55
70
85
100
MAXIMUM AMBIENT TEMPERATURE
(°C)
Thermal Derating
4
3
24V_IN
2
48V_IN
VOUT = 12V
1 fSW = 250kHz
L = 27µH
T_{j_MAX} = 125°C
0
25
40
55
70
85
100
MAXIMUM AMBIENT TEMPERATURE
(°C)
Die Temperature*: The temperature measurement was taken at the hottest point on the MIC28510 case mounted on a five–square inch, four–layer,
0.62”, FR–4 PCB with 2 oz. finish copper weight–pre–layer (see Thermal Measurement section). Actual results will depend upon the size of the PCB,
ambient temperature and proximity to other heat–emitting components.
March 2012
10
M9999-030912-A