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UG-057 Evaluation Board User Guide
Rev. 0 | Page 6 of 20
TYPICAL PERFORMANCE CHARACTERISTICS
For the most up-to-date typical performance characteristics, see the ADP1872/ADP1873 data sheet.
100
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100 100k10k1k
EFFICIENCY (%)
LOAD CURRENT (mA)
WURTH IND: 744325120, L = 1.2µH, DCR: 2.0m
INFINEON FETS: BSC042N03MS G (UPPER/LOWER)
T
A
= 25°C
V
DD
= 5.5V, V
IN
= 5.5V (PSM)
V
DD
= 5.5V, V
IN
= 16.5V (PSM)
V
DD
= 5.5V, V
IN
= 5.5V
V
DD
= 5.5V, V
IN
= 16.5V
V
DD
= 5.5V, V
IN
= 13V (PSM)
V
DD
= 3.6V, V
IN
= 3.6V
V
DD
= 5.5V, V
IN
= 13V
V
DD
= 3.6V, V
IN
= 5.5V
08548-005
Figure 3. Efficiency—300 kHz, V
OUT
= 1.8 V
08548-010
100
20
30
25
35
40
45
50
55
60
65
70
75
80
85
90
95
100 100k10k1k
EFFICIENCY (%)
LOAD CURRENT (mA)
WURTH IND: 744303022, L = 0.22µH, DCR: 0.33m
INFINEON FETs: BSC042N03MS G (UPPER/LOWER)
T
A
= 25°C
V
DD
= 5.5V,
V
IN
= 16.5V (PSM)
V
DD
= 5.5V, V
IN
= 5V (PSM)
V
DD
= 5.5V, V
IN
= 16.5V
V
DD
= 3.6V, V
IN
= 13V
V
DD
= 3.6V, V
IN
= 16.5V
V
DD
= 5.5V,
V
IN
= 13V
(PSM)
V
DD
= 5.5V, V
IN
= 13V
V
DD
= 5.5V,
V
IN
= 5V
Figure 4. Efficiency—1 MHz, V
OUT
= 1.8 V
1.821
1.816
1.811
1.806
1.801
1.796
1.791
5.50 6.95 8.40 9.85 11.30 12.75 14.20 15.65 17.10 18.55 20.00
OUTPUT VOLTAGE (V)
V
IN
(V)
LOAD = 15A
NO LOAD
V
DD
= 5V
T
A
= 25°C
08548-101
Figure 5. Line Regulation Plot for f
SW
= 300 kHz, V
OUT
= 1.8 V
1.815
1.813
1.811
1.809
1.807
1.805
1.803
1.801
0 1500 3000 4500 6000 7500 9000 10,500 12,000 13,500 15,000
OUTPUT VOLTAGE (V)
LOAD CURRENT (mA)
V
IN
= 16.5V
V
IN
= 13V
08548-102
Figure 6. Load Regulation Plot for f
SW
= 300 kHz, V
OUT
= 1.8 V
1.821
1.816
1.811
1.806
1.801
1.796
1.791
1.786
0 1500 3000 4500 6000 7500 9000 10,500 12,000 13,500 15,000
OUTPUT VOLTAGE (V)
LOAD CURRENT (mA)
+125°C
+25°C
–40°C
V
IN
= 5.5V
+125°C
+25°C
–40°C
V
IN
= 13V
+125°C
+25°C
–40°C
V
IN
= 16.5V
08548-014
Figure 7. Output Voltage Accuracy—300 kHz, V
OUT
= 1.8 V
2.649
2.658
2.657
2.656
2.655
2.654
2.653
2.652
2.651
2.650
–40 120100806040200–20
UVLO (V)
TEMPERATURE (°C)
08548-034
Figure 8. UVLO vs. Temperature