MAX8792 Maxim Integrated Products, MAX8792 Datasheet - Page 5

• Manufacturer Part Number: MAX8792
• Description: Single Quick-PWM Step-Down Controller
• Manufacturer: Maxim Integrated Products

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ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
specified.) (Note 1)
Minimum Off-Time
REFIN Voltage Range
FB Voltage Range
FB Voltage Accuracy
REFERENCE
Reference Voltage
FAULT DETECTION
Output Overvoltage-Protection
Trip Threshold
Output Undervoltage-Protection
Trip Threshold
Output Undervoltage
Fault-Propagation Delay
PGOOD Output Low Voltage
V
Threshold
CURRENT LIMIT
ILIM Input Range
Current-Limit Threshold
Ultrasonic Frequency
GATE DRIVERS
DH Gate Driver On-Resistance
DL Gate Driver On-Resistance
Inter nal BS T S w i tch On- Resi stance
CC
Undervoltage Lockout
PARAMETER
_______________________________________________________________________________________
IN
= 12V, V
DD
= V
V
SYMBOL
t
U V L O( V C C )
R
R
OFF(MIN)
V
V
ON(DH)
V
ON(DL)
R
OVP
UVP
t
CC
REFIN
ILIMIT
V
V
UVP
REF
BST
FB
FB
= V
Controller with Dynamic REFIN
EN
(Note 3)
(Note 2)
(Note 2)
M easur ed at FB,
V
SKIP = V
V
With respect to the internal target voltage
(error comparator threshold) rising edge;
hysteresis = 50mV
With respect to the internal target voltage
(error comparator threshold);
falling edge; hysteresis = 50mV
FB forced 25mV below trip threshold
I
Ri si ng ed g e, P W M d i sab l ed b el ow thi s l evel ,
hysteresis = 100mV
V
ILIM = REF (2.0V)
SKIP = open (3.3V), V
BST - LX forced
to 5V
High state (pullup)
Low state (pulldown)
I
SINK
BST
Single Quick-PWM Step-Down
= 5V, REFIN = ILIM = REF, SKIP = GND. T
I N
DD
ILIM
= 2V to 26V ,
= 4.5V to 5.5V
= 10mA, V
= 3mA
= 0.4V
DD
CONDITIONS
DD
V
V
V
Low state (pulldown)
High state (pullup)
= 5V
REFIN
REFIN
REFIN
FB
= V
= 0.5V
= 1.0V
= 2.0V
REFIN
+ 50mV
A
= -40°C to +85°C, unless otherwise
1.985
1.985
0.49
0.99
-240
3.95
MIN
250
0.4
80
17
90
17
0
0
2.015
2.015
MAX
V
V
V
0.51
1.01
-160
4.45
350
350
400
110
0.4
3.5
3.5
23
REF
REF
REF
4
2
7
UNITS
kHz
mV
mV
mV
ns
µs
Ω
Ω
Ω
V
V
V
V
V
V
V
5