l6730cqtr STMicroelectronics, l6730cqtr Datasheet - Page 14

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

Device description
5.2
Figure 4.
5.3
Figure 5.
14/50
4.5V
Internal LDO
An internal LDO supplies the internal circuitry of the device. The input of this stage is the V
pin and the output (5V) is the V
Bypassing the LDO to avoid the voltage drop with low Vcc
The LDO can be by-passed, providing directly a 5V voltage to V
V
least 1µF capacitor to sustain the internal LDO during the recharge of the bootstrap capacitor.
V
(L6730D) and PGOOD pin (see
If Vcc
The maximum LDO output current is about 100mA and so the output voltage drop can be
100mV: to avoid this the LDO can be bypassed.
CCDR
CCDR
LDO block diagram.
Bypassing the LDO
14V
pins must be shorted together as shown in
also represents a voltage reference for Tmask pin, S/O/U pin (L6730C) or CC/O/U pin
5V the internal LDO works in dropout with an output resistance of about 1Ω.
LDO
CCDR
Table 3: Pins
pin (see
Figure
connection).
Figure 5.
4.).
V
CCDR
CCDR
pin must be filtered with at
. In this case Vcc and
L6730C - L6730D
CC