max5951etjt Maxim Integrated Products, Inc., max5951etjt Datasheet - Page 9

• Manufacturer Part Number: max5951etjt
• Description: Max5951 12v/5v Input Buck Pwm Controller
• Manufacturer: Maxim Integrated Products, Inc.

(Typical Operating Circuits. V
C
REG
= 2.2µF, T
100
100
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
0
0
A
0
0
= +25°C.)
EFFICIENCY vs. LOAD CURRENT
EFFICIENCY vs. LOAD CURRENT
V
V
_______________________________________________________________________________________
IN
PWM_IN
0.2
= 5V
0.5
V
PWM_IN
V
= 5V
IN
= 12V
IN
0.4
1.0
= 8V
V
I
IN
I
LOAD
LOAD
= 12V or V
= 8V
V
PWM_IN
(A)
(A)
0.6
1.5
12V/5V Input Buck PWM Controller
V
= 12V
V
PWM_IN
IN
V
V
IN
OUT
= 16V
0.8
OUT
2.0
= V
= 3.3V
= 1.2V
= 16V
REG
1.0
Typical Operating Characteristics (continued)
2.5
1.25A
= 5V, V
0A
DREG
LOAD-TRANSIENT RESPONSE
= V
REG
400µs/div
, V
PGND
= 0V, V
100
90
80
70
60
50
40
30
20
10
MAX5951 toc24
0
0
V
PWM_IN
SYNCIN
EFFICIENCY vs. LOAD CURRENT
LOAD-TRANSIENT RESPONSE
V
V
20mV/div
AC-COUPLED
I
1A/div
OUT1
PWM_IN
OUT1
0.2
= 5V
= 0V, R
= 8V
V
0.4
PWM_IN
I
400µs/div
LOAD
RT
(A)
= 12V
0.6
= 49.9kΩ, R
V
PWM_IN
V
OUT
0.8
MAX5951 toc23
= 2.5V
= 16V
1.0
ILIM
V
50mV/div
AC-COUPLED
I
1A/div
OUT1
OUT1
= 48.7kΩ,
9