Datasheet

Data Sheet ADP1870/ADP1871
Rev. B | Page 13 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)
V
REG
= 2.7V
V
REG
= 5.5V
V
REG
= 3.6V
+125°C
+25°C
–40°C
08730-039
Figure 40. Internal Rectifier Drop vs. Frequency
80
1280
720
640
560
480
1040
1120
1200
960
880
800
400
320
240
160
2.73.13.53.94.34.75.15.5
RECTIFIER DROP (mV)
V
REG
(V)
V
IN
= 5.5V
V
IN
= 16.5V
V
IN
= 13V
1MHz
300kHz
T
A
= 25°C
08730-040
Figure 41. Internal Boost Rectifier Drop vs. V
REG
(Low Input Voltage)
Over V
IN
Variation
80
720
640
560
480
400
320
240
160
2.73.13.53.94.34.75.15.5
RECTIFIER DROP (mV)
V
REG
(V)
1MHz
300kHz +125°C
+25°C
–40°C
08730-041
Figure 42. Internal Boost Rectifier Drop vs. V
REG
8
80
64
72
56
48
40
32
24
16
2.73.13.53.94.34.75.15.5
BODY DIODE CONDUCTION TIME (ns)
V
REG
(V)
1MHz
300kHz +125°C
+25°C
–40°C
08730-042
Figure 43. Lower-Side MOSFET Body Diode Conduction Time vs. V
REG
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
08730-043
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
08730-044
Figure 45. PSM Waveform at Light Load, 500 mA