Datasheet

Automotive Power-Management IC with
Three Step-Down Converters and Linear Regulator
MAX16920
4
ELECTRICAL CHARACTERISTICS (continued)
(V
INA
= V
INB
= 14V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DC-DC Load Regulation LoREG
DC-DC1 (0 to 150mA) 1
%DC-DC2 (0 to 600mA) 1.5
DC-DC3 (0 to 1.5A) 2.5
DC-DC Line Regulation LiREG
DC-DC1, V
INA
, V
INB
= 6V to 18V,
I
OUT1
= 15mA
3
mV/V
DC-DC2, V
INA
, V
INB
= 6V to 18V,
I
OUT2
= 60mA
5
DC-DC3, V
INA
, V
INB
= 6V to 18V,
I
OUT3
= 150mA
3
Soft-Start Time t
SS
MAX16920A 8.5 10 11.5
ms
MAX16920B
Spread-spectrum
disabled
6.5 7.5 8.5
Spread-spectrum
enabled
6.75 8 9.25
Duty-Cycle Range (Note 3) DCR
MAX16920A 3 97
%
MAX16920B 11 96
Input Voltage to Maintain
Constant Switching with
V
OUT_
= 1.22V
(Note 3)
V
INDCL
MAX16920A, limited by minimum
duty cycle, DC-DC2 and DC-DC3
only
18
V
MAX16920B, limited by minimum
duty cycle, DC-DC2 and DC-DC3
only
8
Spread-Spectrum Range SS Spread-spectrum option only 10 %
LINEAR REGULATOR (LDO)
Output Voltage V
OUTA
Output in regulation, I
OUTA
< 100mA,
V
INA
= 6V to 18V
4.85 5 5.15 V
Operating Current I
CCA
No load (excludes DC-DC_ operating
current)
100
FA
Power-Good Threshold PGTA Output rising 88.5 91.5 94.5
% of
V
OUTA
(nom)
Power-Good Threshold Hysteresis PGTAH 2 %
Output Current Limit I
LIMA
200 300 mA
Dropout Voltage V
DA
V
INA
= 5V, I
LDOA
= 100mA (Note 3) 0.5 V
Load Regulation DI I
OUTA
= 5mA to 100mA 30 mV
Line Regulation DV V
INA
= 6V to 18V, I
OUTA
= 50mA 0.05 mV/V
LOGIC LEVELS
POR, PG_, OT, and UVO Output
Voltage Low
V
OL
Sink current = 1mA 0.4 V