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ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - power management - special purpose 250 mA TQFN 40 EP (5x5)
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MAX8660/MAX8660A/MAX8660B/MAX8661
High-Efficiency, Low-I
Q
, PMICs with Dynamic
Voltage Management for Mobile Applications
12
Typical Operating Characteristics (continued)
(Circuit of Figure 3, V
IN
= 3.6V, T
A
= +25°C, unless otherwise noted.)
REG1 OUTPUT VOLTAGE vs. TEMPERATURE
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
MAX8660 toc10
-40 -15 10 35 60 85
3.20
3.22
3.24
3.26
3.28
3.30
3.32
3.34
3.36
3.38
3.40
600mA LOAD
REG1 DROPOUT VOLTAGE vs. LOAD CURRENT
LOAD CURRENT (mA)
DROPOUT VOLTAGE (mV)
MAX8660 toc11
0 200 400 600 800 1000 1200
0
50
100
150
200
250
300
THE NOMINAL ESR OF TOKO'S 1.2µH
DE2812C INDUCTOR IS 44mΩ. THE NOMINAL
p-CHANNEL RESISTANCE OF THE REG1 IS
120mΩ. THE SLOPE OF THIS LINE SHOWS THAT
THE TOTAL REG1 DROPOUT RESISTANCE OF AN
AVERAGE PART, BOARD, INDUCTOR
COMBINATION IS 172mΩ.
REG1 LOAD TRANSIENT
MAX8660 toc12
100mV/div
V1
I
V1
500mA/div
40µs/div
V1 = 3.3V
3.8V INPUT
10mA
800mA
REG 1 HEAVY-LOAD SWITCHING WAVEFORMS
MAX8660 toc13
2V/div
2mV/div
V
LX1
V1
I
L1
1A/div
0A
400ns/div
4.2V INPUT
1A LOAD
REG1 LIGHT-LOAD SWITCHING WAVEFORMS
MAX8660 toc14
2V/div
20mV/div
V
LX1
V1
I
L1
200mA/div
0A
2µs/div
3.8V INPUT, 20mA LOAD
100
95
90
85
80
75
70
65
60
55
50
0.01 10.1 10 100
1000 10,000
REG1 EFFICIENCY vs. LOAD CURRENT
MAX8660 toc06
LOAD CURRENT (mA)
EFFICIENCY (%)
V1 = 3.3V
L1 = 1.2µH
(TOKO DE2812C)
V
IN
= 4.2V
V
IN
= 3.6V
FORCED-PWM
NORMAL
REG1 OUTPUT VOLTAGE vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
MAX8660 toc07
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
I
LOAD
= 1000mA
I
LOAD
= 10mA
3.3V OUTPUT
DROPOUT
REG1 LINE TRANSIENT
MAX8660 toc08
1V/div
V
IN
V1
100mV/div
40µs/div
600mA LOAD,
V1 = 3.3V
5.0V
3.6V