MAX16920 Datasheet, PDF (3/20 Pages) Maxim Integrated Products – Automotive Power-Management IC with Three Step-Down Converters and Linear Regulator

Automotive Power-Management IC with
Three Step-Down Converters and Linear Regulator
ELECTRICAL CHARACTERISTICS (continued)
(VINA = VINB = 14V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP MAX
ODRV Positive Output Drive
Resistance
R_DRV+ Turning off
2000
ODRV Negative Output Drive
Resistance
R_DRV- Turning on
2000
DC-DC CONVERTERS
Free-Running Switching
Frequency Range
SYNC = GND, MAX16920A
f_{SWITCHI SYNC = GND, MAX16920B}
360
1980
400
2200
440
2420
SYNC Input Frequency Range
fSYNC
MAX16920A: switching frequency is
half of f_SYNC (Note 3)
MAX16920B: switching frequency is
equal to f_SYNC (Notes 3, 4)
600
1800
1000
2400
FB_ Voltage
V_{FB_}
Output in regulation,
5.5V < V_{IN­_} < 18V
1.196
(-2%)
1.22
1.244
(+2%)
Power-Good Threshold
PGT Output rising for OUT2 and OUT3
88.5
91.5 94.5
Power-Good Threshold Hysteresis PGTH
3
POR Threshold
POR OUT1 rising
88.5
91.5 94.5
POR Threshold Hysteresis
POR Output Delay
DC-DC1 High-Side Switch R_DSON
DC-DC1 Low-Side Switch R_DSON
DC-DC1 V_OUT1 Accuracy
DC-DC2 High-Side Switch R_DSON
DC-DC2 Low-Side Switch R_DSON
DC-DC2 V_OUT2 Accuracy
DC-DC3 High-Side Switch RDSON
DC-DC3 Low-Side Switch R_DSON
DC-DC3 V_OUT3 Accuracy
DC-DC1 Output Current Limit
DC-DC2 Output Current Limit
DC-DC3 Output Current Limit
PORH
tPOR
R1H
R1L
V1
R2H
R2L
V2
R3H
R3L
V3
I_LIM1
ILIM2
ILIM3
MAX16920A
MAX16920B
Spread-spectrum
disabled
Spread-spectrum
enabled
IOUT1 < 150mA, FB1 connected to
GND, 6V < V_INA < 18V
6V < V_INB < 18V, I_OUT2 < 600mA,
FB2 connected to GND
5.5V < VINB < 18V, IOUT2 = 400mA
4.5V < V_INB < 18V; I_OUT3 = 500mA
6V < V_INB < 18V; I_OUT3 P 1.5A
Peak current limit
Peak current limit
Peak current limit
4.6
6.75
7
-3%
-3%
-3%
240
960
1920
3
5.1
5.6
7.5
8.25
8
9
3
1.55
3.3
+3%
1.7
0.64
5
+3%
3.3
300
1200
2400
0.7
0.3
+3%
360
1440
2880
UNITS
I
I
kHz
kHz
V
% of
VOUT
(NOM)
%
% of
VOUT
(NOM)
%
ms
I
I
V
I
I
V
I
I
V
mA
mA
mA
3