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MAX8597ETP+
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
MAX8597/MAX8598/MAX8599
Low-Dr
opout, Wide-Input-V
oltage,
Step-Down Contr
ollers
_______________________________________________________________________________________
7
OUTPUT PREBIASED STARTUP
MAX8597 toc07
1ms/div
10V/div
V
LX
V
OUT
V
IN
V
DL
1.0V
1.2V
5V/div
5V/div
STARTUP/SHUTDOWN WITH
EN (I
LOAD
= 20A)
MAX8597 toc08
2ms/div
5V/div
V
POK
I
LX
V
OUT
V
EN
10A/div
1V/div
5V/div
OUTPUT VOLTAGE vs. V
ADJ
(V
IN
= 12V)
MAX8597 toc09
V
ADJ
(V)
OUTPUT VOLTAGE (V)
5
4
3
2
1
5
6
7
8
9
10
11
12
13
4
06
CIRCUIT OF FIGURE 1
R
LOAD
= 1.2
Ω
ENTERING DROPOUT WAVEFORMS
CIRCUIT OF FIGURE 1
MAX8597 toc10
2
µ
s/div
10V/div
V
LX
V
OUT
V
COMP
V
IN
(AC-COUPLED)
11V
500mV/div
100mV/div
HEAVY-DROPOUT WAVEFORMS
CIRCUIT OF FIGURE 1
MAX8597 toc11
10
µ
s/div
10V/div
V
LX
V
OUT
V
COMP
V
IN
(AC-COUPLED)
11.9V
500mV/div
500mV/div
OUTPUT TRACKING REFIN
MAX8597 toc12
1ms/div
V
REFIN
V
OUT
1V/div
V
REFIN
V
OUT
1V/div
CIRCUIT OF FIGURE 3
5ms RISE
TIME
1ms RISE
TIME
T
ypical Operating Characteristics (continued)
(Circuit of Figure 4, T
A
= +25°C, 500kHz switching frequency, V
IN
= 12V, unless otherwise noted.)
MAX8597/MAX8598/MAX8599
Low-Dr
opout, Wide-Input-V
oltage,
Step-Down Contr
ollers
8
_______________________________________________________________________________________
T
ypical Operating Characteristics (continued)
(Circuit of Figure 4, T
A
= +25°C, 500kHz switching frequency, V
IN
= 12V, unless otherwise noted.)
50% LOAD STEP AT 5A/
µ
s
MAX8597 toc13
40
µ
s/div
50mV/div
V
OUT
(AC-COUPLED)
I
OUT
20A
10A
90% LOAD STEP AT 5A/
µ
s
MAX8597 toc14
40
µ
s/div
100mV/div
V
OUT
(AC-COUPLED)
I
OUT
20A
2A
SHORT-CIRCUIT RESPONSE
MAX8597 toc15
4ms/div
1V/div
2A/div
V
OUT
I
IN
I
LX
10A/div
OUTPUT OVERVOLTAGE PROTECTION
MAX8597 toc16
10
µ
s/div
500mV/div
10V/div
V
FB
V
DH
V
DL
5V/div
MAX8597/MAX8598/MAX8599
Low-Dr
opout, Wide-Input-V
oltage,
Step-Down Contr
ollers
_______________________________________________________________________________________
9
CONTROL
LOGIC
BIAS
SOFT
-ST
ART
OSC
VL
PGND
DL
LX
DH
VL
V+
VL
REFOUT
(MAX8597)
SS
REFIN
(MAX8597)
FB
AIN-
(MAX8597)
AIN+
(MAX8597)
AOUT
(MAX8597)
COMP
GND
EN
FREQ
AV
L
BST
ILIM
200
µ
A
PWM
REFERENCE
OVP
EAMP
0.7 x V
REG
UVP
N
POK
(MAX8598/
MAX8599)
1.17 x V
REG
(MAX8599)
0.88 x V
REG
1/20
COUNTER
1V
P-P
V
REG
MAX8597
MAX8598
MAX8599
Block Diagram
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
MAX8597ETP+
Mfr. #:
Buy MAX8597ETP+
Manufacturer:
Maxim Integrated
Description:
Switching Controllers Step-Down Controller
Lifecycle:
New from this manufacturer.
Delivery:
DHL
FedEx
Ups
TNT
EMS
Payment:
T/T
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