l6730cqtr STMicroelectronics, l6730cqtr Datasheet - Page 7

• Manufacturer Part Number: l6730cqtr
• Description: Adjustable Step-down Controller With Synchronous Rectification
• Manufacturer: STMicroelectronics

L6730C - L6730D
3
Figure 2.
1. In the L6730D the multifunction pin is: CC/OVP/UVLO.
Table 3.
Pin n.
1
2
3
SINK/OVP/UVLO
PGOO D D ELAY
PGOO D D ELAY
Pin connections and functions
TM ASK
TM ASK
EAREF
EAREF
SINK/OVP/UVLO
Pins connection (top view)
SS/INH
SS/INH
Pins connection
SY NCH
SY NCH
PGOOD DELAY
CC/OVP/UVLO
CO MP
CO MP
GN D
GN D
OSC
OSC
FB
FB
SYNCH
L6730C
L6730D
Name
10
10
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
HTSSO P20
HTSSO P20
HTSSOP20
Connecting a capacitor between this pin and ground a delay is introduced
between the trigger of the internal PGOOD comparator and the external signal
rising edge. No delay can be introduced on the falling edge of the PGOOD
signal. The delay can be calculated with the following formula:
It is a Master-Slave pin. Two or more devices can be synchronized by simply
connecting the SYNCH pins together. The device operating with the highest
F
from the Master. The best way to synchronize devices together is to set their
F
With this pin it is possible:
– To enable-disable the sink mode current capability after SS (L6730C);
– To enable-disable the constant current OCP after SS (L6730D);
– To enable-disable the latch mode for the OVP;
– To set the UVLO threshold for the 5V BUS and 12V BUS.
The device captures the analog value present at this pin at the start-up when
V
SW
SW
CC
20
20
19
19
18
18
17
17
16
16
15
15
14
14
13
13
12
12
11
11
meets the UVLO threshold.
will be the Master. The Slave devices will operate with 180° phase shift
at the same value. If it is not used the SYNCH pin can be left floating.
V CC
V CC
PGOO D
PGOO D
V CCD R
V CCD R
PGN D
PGN D
HG ATE
HG ATE
PH ASE
PH ASE
LGA TE
LGA TE
BOO T
BOO T
O CL
O CL
OCH
OCH
PGDelay
Description
0
5 .
C
pF
QFN 4x4 24L
Pin connections and functions
s]
7/50