Typical operating characteristics – Rainbow Electronics MAX8620 User Manual
Page 4
MAX8620Y
µPMIC for Microprocessors or DSPs
in Portable Equipment
4
_______________________________________________________________________________________
Typical Operating Characteristics
(V
IN1
= V
IN2
= 3.7V, PWR_ON = IN1, L = 2.2µH (LQH31CN2R2M53), C
FF
= 150pF, V
OUT1
= V
OUT2
= 2.6V, V
OUT3
= 1.867V (R1 =
150k
Ω, R2 = 75kΩ), C
IN
= 10µF, C
BP
= 0.01µF, C
OUT1
= C
OUT2
= 4.7µF, C
OUT3
= 2.2µF, RESET pulled up with 100k
Ω to OUT1,
T
A
= +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
MAX8620Y toc01
LOAD CURRENT (mA)
EFFICIENCY (%)
100
10
1
10
20
30
40
50
60
70
80
90
100
0
0.1
1000
L = 4.7
µH
L = 2.2
µH
L = 1.0
µH
INPUT QUIESCENT CURRENT
vs. INPUT VOLTAGE
MAX8620Y toc02
INPUT VOLTAGE (V)
QUIESCENT CURRENT (
µ
A)
5.0
4.5
3.5
4.0
3.0
2.5
20
40
60
80
100
120
140
160
180
0
2.0
5.5
SWITCHING FREQUENCY vs. LOAD CURRENT
SWITCHING FREQUENCY (MHz)
450
400
350
300
250
200
150
100
50
1
10
0.1
0
500
MAX8620Y toc03
LOAD CURRENT (mA)
L = 4.7
µH
L = 2.2
µH
L = 1.0
µH
EFFICIENCY vs. OUTPUT VOLTAGE
OUTPUT VOLTAGE (V)
EFFICIENCY (%)
2.4
2.2
0.8 1.0 1.2
1.6 1.8
1.4
2.0
65
70
75
80
85
90
95
100
60
0.6
2.6
MAX8620Y toc04
L = 4.7
µH
L = 2.2
µH
L = 1.0
µH
LIGHT-LOAD SWITCHING WAVEFORMS
MAX8620Y toc05
200ns/div
I
L
V
OUT
AC-COUPLED
2V/div
20mV/div
100mA/div
V
LX
HEAVY-LOAD SWITCHING WAVEFORMS
MAX8620Y toc06
200ns/div
I
L
V
OUT
AC-COUPLED
2V/div
20mV/div
200mA/div
V
LX