PE99153 Datasheet, PDF (5/15 Pages) Peregrine Semiconductor – Radiation Hardened UltraCMOS Monolithic Point-of-Load Synchronous Buck Regulator with Integrated Switches

PE99153
Product Specification
Typical Performance Characteristics
Figure 4. Efficiency Curves Over Output
Load Current and Temperature
PE99153 Efficiency versus Output Current
VIN=5V, VOUT=2.5V, Fsw=1MHz
100
95
90
85
80
75
70
65
Tc = ‐55°C
TC = +25°C
60
Tc = +125°C
55
50
0
1
2
3
4
5
6
Output Current (A)
Figure 5. Efficiency Curves Over Typical
Output Voltages
PE99153 Efficiency versus Output Current
Vin=5V, Fsw=1MHz, T=+25°C
100
95
90
85
80
75
70
Vout = 3.3V
65
Vout = 2.5V
60
Vout = 1.5V
Vout = 1.0V
55
50
0
1
2
3
4
5
6
Output Current (A)
Thermal Derating Curve
The thermal derating curve plots the case temper-
ature against the maximum current allowed while
maintaining safe electrical operation below the
maximum junction temperature. Reliability guide-
lines require the continuous or average output
current to remain below 6A at 125°C junction tem-
perature. At full load and 125°C case tempera-
ture, the die temperature will exceed 125°C. The
output current should be derated starting at 114°C
case based on the specific application’s worst-
case time averaged current analysis using
Figure 6.
Figure 6. Thermal Derating Curve
ILOAD (max continuous / average) derating for Tcase
8
7
6
5
4
3
2
1
0
-50
-25
0
25
50
75
Case Temperature (^oC)
100
125
The PE99153 meets the maximum allowable re-
quirement of MIL-PRF-38535 (<2 x 10⁵ A / cm²) by
achieving a current density of <1.5 x 10⁵ A / cm².
Document No. DOC-29414-2 │ www.psemi.com
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