max5951etjt Maxim Integrated Products, Inc., max5951etjt Datasheet - Page 4

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

12V/5V Input Buck PWM Controller
ELECTRICAL CHARACTERISTICS (continued)
(V
-40°C to +85°C, unless otherwise noted. Typical values are at T
4
PWM COMPARATOR
Comparator Offset Voltage
Comparator Propagation Delay
PWM DIGITAL SOFT-START
Soft-Start Duration
Reference Voltage Steps
PWM RAMP GENERATOR
Ramp Amplitude
PWM CURRENT-LIMIT COMPARATOR AND HICCUP MODE
Cycle-by-Cycle Valley Current-
Limit Threshold Adjustment
Range
Cycle-by-Cycle Valley Current-
Limit Threshold Tolerance
ILIM Reference Current
ILIM Reference Current Tempco
CS+, CS- Input Bias Current
PWM HICCUP MODE
Number of Cumulative Current-
Limit Events to Hiccup
Number of Consecutive
Noncurrent-Limit Cycles to Clear
N
Hiccup Timeout
PWM STARTUP INPUT
STARTUP Threshold
STARTUP Threshold Hysteresis
Internal Pullup Current
STARTUP Output Voltage Low
PWM DH DRIVER
Peak Source Current
Peak Sink Current
DH Resistance Sourcing
DH Resistance Sinking
IN
CL
_______________________________________________________________________________________
= 12V or V
PARAMETER
IN
= V
REG
= 5V, V
DREG
SYMBOL
I
= V
N
START
V
N
N
CLR
SUT
CL
HT
REG
, V
PGND
I
V
V
V
V
I
I
Limit = V
V
V
V
V
CS_
STARTUP
DH
DH
DH,LX
BST,LX
DH,LX
BST,LX
ILIM
ILIM
ILIM
CS+
= 50mA, V
= -50mA, V
= 0V, V
= 0.5V
= 3.5V
= 0 to 3.5V, T
= 0V, V
= 0V, pulse width < 100ns,
= 5V, pulse width < 100ns,
= 5V
= 5V
ILIM
= -2.4mA
A
SYNCIN
/ 10
CS-
= T
CONDITIONS
BST,LX
BST,LX
= -0.3V, current out of the
J
= +25°C.) (Note 1)
A
= 0V, R
= T
= 5V
= 5V
J
= +25°C
RT
= 100kΩ, R
ILIM
44.5
MIN
330
1.1
50
19
-1
= 60kΩ, C
1024
3333
TYP
128
512
250
0.3
6.3
1.8
40
20
10
8
3
2
2
1
1
REG
= 2.2µF, T
MAX
55.5
350
366
+20
1.9
0.1
21
3
3
ppm/°C
A
UNITS
Clocks
Clocks
Clocks
Clocks
Steps
= T
mV
mV
mV
mV
µA
µA
µA
ns
Ω
Ω
V
V
V
V
A
A
J
=