Datasheet
ADP1874/ADP1875 Data Sheet
Rev. A | Page 14 of 44
80
800
720
640
560
480
400
320
240
160
300 400 500 600 700 800 900 1000
RECTIFIER DROP (mV)
FREQUENCY (kHz)
VREG = 2.7V
VREG = 5.5V
VREG = 3.6V
+125°C
+25°C
–40°C
09347-039
Figure 40. Internal Rectifier Drop vs. Frequency
80
1280
720
640
560
480
1040
1120
1200
960
880
800
400
320
240
160
2.7
3.1 3.5 3.9 4.3 4.7 5.1 5.5
RECTIFIER DROP (mV)
VREG (V)
V
IN
= 5.5V
V
IN
= 16.5V
V
IN
= 13V
1MHz
300kHz
T
A
= 25°C
09347-040
Figure 41. Internal Boost Rectifier Drop vs. VREG (Low Input Voltage)
Over V
IN
Variation
80
720
640
560
480
400
320
240
160
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
RECTIFIER DROP (mV)
VREG (V)
1MHz
300kHz +125°C
+25°C
–40°C
09347-041
Figure 42. Internal Boost Rectifier Drop vs. VREG
8
80
64
72
56
48
40
32
24
16
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
BODY DIODE CONDUCTION TIME (ns)
VREG (V)
1MHz
300kHz
+125°C
+25°C
–40°C
09347-042
Figure 43. Lower Side MOSFET Body Diode Conduction Time vs. VREG
CH1 50mV
B
W
CH2 5A Ω
CH3 10V
B
W
CH4 5V
M400ns A CH2 3.90A
T 35.8%
1
2
3
4
OUTPUT VOLTAGE
INDUCTOR CURRENT
SW NODE
LOW SIDE
09347-043
Figure 44. Power Saving Mode (PSM) Operational Waveform, 100 mA
CH1 50mV
B
W
CH2 5A Ω
CH3 10V
B
W
CH4 5V
M4.0µs A CH2 3.90A
T 35.8%
1
2
3
4
OUTPUT VOLTAGE
INDUCTOR CURRENT
SW NODE
LOW SIDE
09347-044
Figure 45. PSM Waveform at Light Load, 500 mA