MAX8704 Просмотр технического описания (PDF) - Maxim Integrated
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MAX8704
Maxim Integrated
MAX8704 Datasheet PDF : 13 Pages
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High-Current, Low-Voltage Linear Regulator
with Power-Limited, External MOSFET
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VOUT = 1.5V, TA = +25°C, unless otherwise noted.)
POWER LIMIT
MAX8704 toc10
3A LOAD TRANSIENT
(IRF7401)
MAX8704 toc11
3A LOAD TRANSIENT
(FDS6570A)
MAX8704 toc12
5V
A
3.5A
A
3.5A
A
0.5A
0.5A
0
B
3.5V
B
3.0V
B
0
3.0V
2.5V
1.5V
C
1.8V
C
1.8V
C
0
1.7V
1.7V
4A
1.50V
1.50V
0
D
1.45V
D
1.45V
D
4ms/div
A. EN/SS, 2V/div
B. PLIM, 0.5V/div
C. LDO OUTPUT, 1V/div
D. FET CURRENT, 5A/div
0.4Ω LOAD, CSS = 10nF, VIN = 1.8V,
RPLIM = 200kΩ, CPLIM = 0.1µF
LINE TRANSIENT
(1.8V TO 2.5V)
2.5V
2.0V
1.5V
20µs/div
A. LOAD: 0.5A - 3.5A, 3A/div C. INPUT, 100mV/div
B. DRV, 0.5V/div
D. OUTPUT, 50mV/div
VIN = 1.8V
20µs/div
A. LOAD: 0.5A - 3.5A, 3A/div C. INPUT, 100mV/div
B. DRV, 0.5V/div
D. OUTPUT, 50mV/div
VIN = 1.8V
MAX8704 toc13
A
GAIN AND PHASE vs. FREQUENCY
60
40
20
0
-20
0.001
0.01
0.1
1
10
3.5V
3.3V
1.51V
1.50V
180°
B
90°
0°
-90°
C
-180°
1.49V
40µs/div
A. INPUT: 1.8V TO 2.5V, 0.5V/div C. OUTPUT, 10mV/div
B. DRV, 200mV/div
ROUT = 1.5Ω
GAIN AND PHASE vs. FREQUENCY
60
40
20
0
-20
0.001
0.01
0.1
1
10
180°
90°
0°
-90°
-180°
0.001
0.01
0.1
1
10
FREQUENCY (MHz)
FB = CSN, VOUT = 0.5V, VIN = 1.0V
COUT = 100µF 70mΩ SANYO 4TPB100M, IOUT = 0.5A
0.001
0.01
0.1
1
10
FREQUENCY (MHz)
FB = CSN, VOUT = 0.5V, VIN = 1.0V
COUT = 2 x 22µF 1206 CERAMIC, IOUT = 0.5A
PSRR
MAX8704 toc16
40
0
-40
-80
-120
0.001 0.01 0.1
1
10
FREQUENCY (MHz)
FB = VCC, VOUT = 1.5V, VIN = 2.5V
COUT = 2 x 22µF 1206 CERAMIC, IOUT = 0.5A
6 _______________________________________________________________________________________
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