l6730cqtr STMicroelectronics, l6730cqtr Datasheet - Page 40

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

I/O Description
8
Figure 35. Demoboard
Table 10.
40/50
Output (V
Input (V
V
CC
Symbol
V
-GND
TP1
TP2
TP3
CCDR
I/O Description
OUT
IN
I/O Functions
-G
-G
CC
IN
OUT
)
)
The input voltage can range from 1.8V to 14V. If the input voltage is between 4.5V and 14V
it can supply also the device (through the V
jumper G1 must be connected together.
The output voltage is fixed at 3.3V but it can be changed by replacing the resistor R14 of the
output resistor divider:
The over-current-protection limit is set at 15A but it can be changed by replacing the
resistors R1 and R12 (see OCL and OCH pin in
Using the input voltage to supply the controller no power is required at this input.
However the controller can be supplied separately from the power stage through
the V
An internal LDO provides the power into the device. The input of this stage is the V
and the output (5V) is the Vccdr pin. The LDO can be bypassed, providing directly a 5V
voltage from V
shorted.
This pin can be used as an input or as a test point. If all the jumper G2 pins are shorted, TP1
can be used as a test point of the voltage at the EAREF pin. If the pins 2 and 3 of G2 are
connected together, TP1 can be used as an input to provide an external reference for the
internal error amplifier (see section 4.3. Internal and external references).
This test point is connected to the Tmask pin (see
This test point is connected to the S/O/U pin (see
CC
input (4.5-14V) and, in this case, jumper G1 must be left open.
CCDR
and Gndcc. In this case the pins 1 and 3 of the jumper G1 must be
Vo
V
Function
REF
CC
pin) and in this case the pin 1 and 2 of the
1 (
Table 3: Pins
Chapter 5.10 on page
Table 3: Pins
R
R
16
14
)
connection).
connection).
L6730C - L6730D
25).
CC
pin