Datasheet

EVAL-ADP2105
Rev. 0 | Page 6 of 12
TYPICAL PERFORMANCE CHARACTERISTICS
100
50
LOAD CURRENT (mA)
EFFICIENCY (
%
)
95
90
85
80
75
70
65
60
55
V
IN
=2.7V
V
IN
=3.6V
V
IN
=4.2V
V
IN
=5.5V
INDUCTOR: SD3814, 3.3µH
DCR: 93mΩ
T
A
=25°C
1 10 100 1000
06312-004
Figure 3. Efficiency—ADP2105-1.8-EVAL (1.8 V Output)
CH1 50mV
6%CH4 200mAΩCH3 2V
M 2µs A CH3 3.88V
T
3
4
1
INDUCTOR CURRENT
OUTPUT VOLTAGE (AC-COUPLED)
LX NODE
(SWITCH NODE)
06312-005
Figure 4. PFM Mode of Operation at Light Load (10 mA)
CH2 100mV~ CH3 1ACH1 2V M 10µs A CH3 0.5A
1
3
2
LX NODE (SWITCH NODE)
OUTPUT VOLTAGE (AC-COUPLED)
OUTPUT CURRENT
OUTPUT CAPACITOR: 22µF + 22µF
INDUCTOR: SD3814, 3.3µH
COMPENSATION RESISTOR: 270kΩ
COMPENSATION CAPACITOR: 39pF
CH2 LOW
–112mV
06312-006
Figure 5. 1 A Load Transient Response for ADP2105-1.8-EVAL
50
55
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
1 10 100 1000
LOAD CURRENT (mA)
06312-007
INDUCTOR: SD3814, 3.3µH
DCR: 93mΩ
T
A
= 25°C
V
IN
= 3.0V
V
IN
= 4.2V
V
IN
= 5.5V
V
IN
= 3.6V
Figure 6. Efficiency—ADP2105-EVAL (2.5 V Output)
CH1 20mV
17.4%CH4 1AΩCH3 2V
M 1µs A CH3 3.88V
T
3
4
1
LX NODE (SWITCH NODE)
OUTPUT VOLTAGE (AC-COUPLED)
INDUCTOR CURRENT
06312-008
Figure 7. PWM Mode of Operation at Medium/Heavy Load (1 A)
3
1
2
T
CH1 2V
20.20%
CH2 100mV~
CH3 5V
M 10µs A CH3 2.60V
T
CH2 LOW
–136mV
06312-009
LX NODE (SWITCH NODE)
OUTPUT VOLTAGE (AC-COUPLED)
OUTPUT CURRENT
Figure 8. 1 A Load Transient Response for ADP2105-EVAL with V
OUT
Set to 2.5 V