MAX888ECJ(1999) 查看數據表（PDF） - Maxim Integrated
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MAX888ECJ Datasheet PDF : 20 Pages
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Wireless and Satellite Handset
Power-Management ICs
Typical Operating Characteristics
(Circuit of Figure 2, REG0 to REG5 outputs at POR states, VOUT0 = 3.75V, VOUT4 = 5.25V, VOUT1 = VOUT2 = VOUT3 = VOUT5 = 3.3V,
TA = +25°C, unless otherwise noted.)
MAX886
REG0 EFFICIENCY vs. LOAD CURRENT
(VBATT = 8.4V)
100
90
PFM, 925kHz
PFM, 375kHz
80
PWM, 375kHz
70
PWM, 925kHz
60
MAX886
REG0 EFFICIENCY vs. LOAD CURRENT
(VBATT = 5.4V)
100
PFM, 375kHz
90 PFM, 925kHz
80
PWM, 925kHz
70
PWM, 375kHz
60
50
1
10
100
1,000
LOAD CURRENT (mA)
MAX888
REG0 EFFICIENCY vs. LOAD CURRENT
(VBATT = 4.2V)
100
90
PFM, 375kHz
PFM, 925kHz
80
PWM, 925kHz
70
PWM, 375kHz
60
50
1
10
100
LOAD CURRENT (mA)
1,000
MAX888
REG0 EFFICIENCY vs. LOAD CURRENT
(VBATT = 2.7V)
100
PFM, 925kHz
PFM, 375kHz
90
PWM, 375kHz
80
PWM, 925kHz
70
60
50
1
10
100
LOAD CURRENT (mA)
1,000
DROPOUT VOLTAGE
vs. LOAD CURRENT
140
VIN1 = VIN2 = VIN5 = 3.3V
120 VIN3 = 2.85V
100
REG1
80
REG5
60
REG3
40
REG2
20
0
0 20 40 60 80 100 120 140 160 180 200
LOAD CURRENT (mA)
50
1
5.28
5.26
5.24
5.22
5.20
5.18
5.16
5.14
5.12
0
10
100
LOAD CURRENT (mA)
1,000
REG4 OUTPUT VOLTAGE
vs. LOAD CURRENT
VIN4 = 3.75V
20
40
60
80 100
LOAD CURRENT (mA)
MAX886
NO-LOAD BATTERY CURRENT
vs. BATTERY VOLTAGE
10
9
8
PWM, 925kHz
7
6
5
4
3
PWM, 375kHz
2
1
PFM MODE
0
2 3 4 5 6 7 8 9 10 11 12
BATTERY VOLTAGE (V)
MAX888
NO LOAD BATTERY CURRENT
vs. BATTERY VOLTAGE
7
6
5
PWM, 925kHz
4
3
PWM, 375kHz
2
1
PFM MODE
0
2
3
4
5
6
BATTERY VOLTAGE (V)
SHUTDOWN CURRENT
vs. BATTERY VOLTAGE
10
9 R1, R2, R3 NOT CONNECTED
8
7
6
5
4
3
2
1
0
2 3 4 5 6 7 8 9 10 11 12
BATTERY VOLTAGE (V)
6 _______________________________________________________________________________________
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