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MAX8745AETJ+ Datasheet(PDF) 11 Page - Maxim Integrated Products

Part # MAX8745AETJ+
Description  High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers
Download  36 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX8745AETJ+ Datasheet(HTML) 11 Page - Maxim Integrated Products

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High-Efficiency, Quad Output, Main Power-
Supply Controllers for Notebook Computers
______________________________________________________________________________________
11
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN = 12V, SKIP = GND, FSEL = REF, TA = +25°C, unless otherwise noted.)
SOFT-START WAVEFORM
MAX8744A toc16
B
A
400
μs/div
C
D
E
3.3V
0
5V
0
0
0
12V
5A
0
A. ON3 AND ON5, 5V/div
B. 5V OUTPUT (VOUT5), 5V/div
C. PGOOD5, 5V/div
D. AUX LDO OUTPUT
(VOUTA), 10V/div
E. L5 INDUCTOR CURRENT,
5A/div
SMPS DELAYED STARTUP SEQUENCE
(ON3 = REF)
MAX8744A toc17
B
A
1ms/div
C
D
E
3.3V
0
5V
0
0
0
3.3V
0
A. ON5, 5V/div
B. 5V OUTPUT (VOUT5), 5V/div
C. PGOOD5, 5V/div
ON3 = REF
D. 3.3V OUTPUT (VOUT3),
5V/div
E. PGOOD3, 5V/div
SMPS DELAYED STARTUP SEQUENCE
(ON5 = REF)
MAX8744A toc18
B
A
1ms/div
C
D
E
3.3V
0
5V
0
0
0
3.3V
0
A. ON3, 5V/div
B. 5V OUTPUT (VOUT5), 5V/div
C. PGOOD5, 5V/div
ON5 = REF
D. 3.3V OUTPUT (VOUT3),
5V/div
E. PGOOD3, 5V/div
SMPS SHUTDOWN WAVEFORM
MAX8744A toc19
B
A
1ms/div
C
D
E
3.3V
5V
3.3V
5V
0
0
0
0
A. SHDN, 5V/div
B. 5V OUTPUT (VOUT5), 5V/div
C. PGOOD5, 5V/div
NO LOAD
D. 3.3V OUTPUT (VOUT3),
5V/div
E. PGOOD3, 5V/div
OUT5 LOAD TRANSIENT
MAX8744A toc20
B
A
20
μs/div
C
D
5A
5.1V
1A
5A
12V
5.0V
4.9V
0
1A
A. IOUT5 = 1A TO 5A, 5A/div
B. VOUT5, 50mV/div
C. INDUCTOR CURRENT,
5A/div
D. LX5, 10V/div
OUT3 LOAD TRANSIENT
MAX8744A toc21
B
A
20
μs/div
C
D
3A
3.35V
1A
3A
12V
3.30V
3.25V
0
1A
A. IOUT3 = 1A TO 3A, 5A/div
B. VOUT3, 50mV/div
C. INDUCTOR CURRENT,
5A/div
D. LX3, 10V/div


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