Electrical characteristics (continued) – Rainbow Electronics MAX17409 User Manual
Page 4
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
IN
= 12V, V
DD
= V
CC
= 5V, SHDN = ILIM = V
CC
, SKIP = GNDS = PGND = GND, V
FB
= V
CSP
= V
CSN
= 1.05V;
G5–G0 set for 1.05V (G0–G5 = 100110); T
A
= 0
°C to +85°C, unless otherwise specified. Typical values are at T
A
= +25°C.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
THERMAL COMPARATOR AND PROTECTION
VRHOT Trip Threshold
Measured at THRM with respect to V
CC
;
falling edge; typical hysteresis = 100mV
29.2 30 30.8 %
VRHOT Delay
t
VRHOT
THRM forced 25mV below the
VRHOT trip
threshold; falling edge
10 µs
VRHOT Output On-Resistance
R
VRHOT
Low state
2
8
VRHOT Leakage Current
I
VRHOT
High state,
VRHOT forced to 5V, T
A
= +25
°C 1 µA
THRM Input Leakage
I
THRM
V
THRM
= 0 to 5V, T
A
= +25
°C -100
+100
nA
Thermal-Shutdown Threshold
T
SHDN
Typical hysteresis = 15
°C
160
°C
VALLEY CURRENT LIMIT AND DROOP
V
REF
- V
ILIM
= 100mV
7
10
13
Current-Limit Threshold Voltage
(Positive Adjustable)
V
LIMIT
V
CSP
- V
CSN
V
REF
- V
ILIM
=
500mV 45 50 55
mV
Current-Limit Threshold Voltage
(Positive Default)
ILIM
=
V
CC
, V
CSP
- V
CSN
20
22.5
25
mV
Current-Limit Threshold Voltage
(Negative) Accuracy
V
LIMIT(NEG)
V
CSP
- V
CSN
, nominally -125% of V
LIMIT
-4 +4
mV
Current-Limit Threshold Voltage
(Zero Crossing)
V
ZERO
V
PGND
- V
LX
1 mV
CSP, CSN Common-Mode
Input Range
0
1.9
V
CSP, CSN Input Current
T
A
= +25°C
-0.2
+0.2
µA
ILIM Input Current
T
A
= +25°C
-100
+100
nA
Droop Amplifier (GMD) Offset
(V
CSP
- V
CSN
) at I
FB
= 0
-0.75
+0.75
mV
Droop Amplifier (GMD)
Transconductance
I
FB
/
(V
CSP
- V
CSN
);
FB = CSN = 0.45V to 2.0V,
and (V
CSP
- V
CSN
) = -15.0mV to +15.0mV
592
600
608
µS
GATE DRIVERS
High state (pullup)
0.9
2.5
DH Gate-Driver On-Resistance
R
ON(DH)
BST - LX forced
to 5V
Low state (pulldown)
0.7
2.0
High state (pullup)
0.7
2.0
DL Gate-Driver On-Resistance
R
ON(DL)
Low state (pulldown)
0.25
0.7
DH Gate-Driver Source Current
I
DH(SOURCE)
DH forced to 2.5V, BST - LX forced to 5V
2.2
A
DH Gate-Driver Sink Current
I
DH(SINK)
DH forced to 2.5V, BST - LX forced to 5V
2.7
A
DL Gate-Driver Source Current
I
DL(SOURCE)
DL forced to 2.5V
2.7
A
DL Gate-Driver Sink Current
I
DL(SINK)
DL forced to 2.5V
8
A
Internal BST Switch
On-Resistance
R
BST
I
BST
= 10mA, V
DD
= 5V
10
20
MAX17409
1-Phase Quick-PWM GPU Controller
4
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