MAX16920(2011) 查看數據表（PDF） - Maxim Integrated
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MAX16920
(Rev.:2011)
(Rev.:2011)
Maxim Integrated
MAX16920 Datasheet PDF : 20 Pages
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Automotive Power-Management IC with
Three Step-Down Converters and Linear Regulator
Pin Configuration
TOP VIEW
24 23 22 21 20 19 18 17
EN2 25
16 BST2
0T 26
15 VINB
UVO 27
14 LX2
SYNC 28
PG3 29
MAX16920
13 PGNDB
12 LX1
PG2 30
11 VINA
PGA 31
POR 32
+ EP*
10 BST1
9 ODRV
1 2345678
*CONNECT TO GND.
TQFN
Pin Description
PIN
NAME
FUNCTION
1
ENA
LDO Enable Input. Drive ENA high to enable the LDO (OUTA). Drive low to disable the LDO.
2
VL
Internal Regulator Output. Bypass VL to GND with a 4.7FF capacitor.
3
GND
Ground
DC-DC1 Converter Output. OUT1 supplies internal circuitry in standby mode reducing overall
4
OUT1
current consumption. Connect a 0.1FF capacitor from OUT1 to GND as close as possible to the IC.
If the DC-DC1 output is pulled below its power-on-reset threshold (POR), DC-DC2 and DC-DC3 are
automatically disabled.
5
FB1
DC-DC1 Converter Feedback Input. Connect FB1 to GND for a fixed 3.3V output. Connect to a
resistive divider to adjust the output voltage between 1.22V and 5.5V.
6
OUT2 DC-DC2 Converter Output
7
FB2
DC-DC2 Converter Feedback Input. Connect FB2 to GND for a fixed 5V output. Connect to a
resistive divider to adjust the output voltage between 1.22V and 5V.
8
OUTA 5V Linear Regulator Output. Connect an external capacitor of at least 4.7FF from OUTA to GND.
9
ODRV
External pMOS Output Drive Signal. ODRV turns off the pMOS during overvoltage events. If only
DC-DC1 is running, the overvoltage circuit is disabled and the external pMOS is turned off.
10
BST1
Bootstrap Capacitor Connection for DC-DC1. Connect a 0.47FF capacitor from BST1 to LX1.
11
VINA
Battery Supply-Voltage Input. VINA supplies power to the VL regulator, the LDO, and DC-DC1.
12
LX1
DC-DC1 Converter Switching Node. Connect an LC filter to LX1. Use a capacitor with a maximum
ESR of 0.3I. Unless there is an undervoltage lockout, DC-DC1 is always on when power is applied.
8
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