MAX5951 Maxim Integrated Products, MAX5951 Datasheet - Page 7

• Manufacturer Part Number: MAX5951
• Description: Buck PWM Controller
• Manufacturer: Maxim Integrated Products

(Typical Operating Circuits. V
C
REG
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0
= 2.2µF, T
-40
RESISTANCE SOURCING
DL, DH DRIVER ON-RESISTANCE
PWREN SWITCHING
FROM HIGH TO LOW
PWREN SWITCHING
FROM HIGH TO LOW
-15
PGOOD SEQUENCING (FIGURE 1)
A
vs. TEMPERATURE
TEMPERATURE (°C)
= +25°C.)
TRACKING (FIGURE 1)
10
_______________________________________________________________________________________
RESISTANCE SINKING
400µs/div
35
1ms/div
IN
= 12V or V
V
FB
60
= 0.9V
12V/5V Input Buck PWM Controller
MAX5951 toc15c
MAX5951 toc15a
85
IN
= V
OUT1
1V/div
OUT1
1V/div
DCENI_ = STARTUP
5V/div
OUT2
1V/div
PGOOD_
5V/div
DCENI
5V/div
OUT2
1V/div
PGOOD3
5V/div
OUT3
1V/div
OUT3
1V/div
REG
Typical Operating Characteristics (continued)
3.25
3.00
2.75
2.50
2.25
2.00
-40
= 5V, V
QUIESCENT SUPPLY CURRENT
-15
DREG
vs. TEMPERATURE
TEMPERATURE (°C)
10
= V
REG
35
V
, V
PWM_IN
V
PWM_IN
PGND
0A
0A
0V
0V
0V
PWREN SWITCHING
FROM HIGH TO LOW
60
= 16V
= 12V
STARTUP SEQUENCING (FIGURE 1)
= 0V, V
85
OVERLOAD RESPONSE
SYNCIN
2ms/div
4µs/div
6.75
6.50
6.25
6.00
5.75
5.50
= 0V, R
-40
SWITCHING SUPPLY CURRENT
-15
RT
MAX5951 toc15b
MAX5951 toc16a
vs. TEMPERATURE
= 49.9kΩ, R
TEMPERATURE (°C)
10
LX
10V/div
OUT1
1V/div
OUT2
1V/div
PGI = PGOOD3
5V/div
DCENI_ = STARTUP
5V/div
OUT3
1V/div
OUT1
1V/div
I
2A/div
DL
10V/div
STARTUP
5V/div
OUT1
V
PWM_IN
35
V
PWM_IN
ILIM
= 16V
= 48.7kΩ,
= 12V
60
85
7