MAX5951 Maxim Integrated Products, MAX5951 Datasheet - Page 8

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

12V/5V Input Buck PWM Controller
8
(Typical Operating Circuits. V
C
REG
_______________________________________________________________________________________
= 2.2µF, T
OVERLOAD RESPONSE (HICCUP MODE)
A
= +25°C.)
BREAK-BEFORE-MAKE TIME
SHORT-CIRCUIT RESPONSE
(HICCUP MODE)
400µs/div
10ns/div
IN
400µs/div
= 12V or V
MAX5951 toc16b
MAX5951 toc19a
IN
MAX5951 toc17b
= V
REG
LX
10V/div
OUT1
1V/div
I
2A/div
DL
10V/div
STARTUP
5V/div
Typical Operating Characteristics (continued)
LX1
5V/div
DL1
5V/div
OUT1
DL
10V/div
STARTUP
5V/div
OUT1
SHORTED
TO PGND
1V/div
I
2A/div
LX
10V/div
OUT1
= 5V, V
DREG
= V
REG
, V
PGND
I
OUT
= 0V, V
BREAK-BEFORE-MAKE TIME
= 0.5A
SHORT-CIRCUIT RESPONSE
SYNCHRONIZATION
SYNCIN
10ns/div
200ns/div
2µs/div
= 0V, R
RT
MAX5951 toc19b
MAX5951 toc17a
MAX5951 toc18
= 49.9kΩ, R
LX1
10V/div
DL1
5V/div
DL
5V/div
STARTUP
5V/div
DL
5V/div
OUT1 SHORTED
TO PGND
1V/div
LX
10V/div
SYNCIN2 = SYNCOUT1
5V/div
LX
5V/div
ILIM
= 48.7kΩ,