L6731D STMicroelectronics, L6731D Datasheet - Page 7

• Manufacturer Part Number: L6731D
• Description: IC CTRLR ADJ STPDN SYNC 16-TSSOP
• Manufacturer: STMicroelectronics

Specifications of L6731D

• Applications: Controller, DDR
• Voltage - Input: 1.8 ~ 14 V
• Number Of Outputs: 1
• Voltage - Output: Adjustable down to 0.6V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP Exposed Pad, 16-eTSSOP, 16-HTSSOP
• Output Voltage: 0.6 V to 18 V
• Output Current: 30 A
• Input Voltage: 1.8 V to 14 V
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Package: HTSSOP16
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L6731D
Table 4.
Pin n.
10
11
12
13
14
15
16
8
9
Pin functions (continued)
PHASE
HGATE
LGATE
V
PGND
Name
BOOT
OCH
OCL
V
CCDR
CC
A resistor connected from this pin to ground sets the valley- current-limit.
The valley current is sensed through the low-side MOSFET(s). The internal
current generator sources a current of 100 µA (I
through the external resistor (R
the following equation:
Connecting a capacitor from this pin to GND helps in reducing the noise
injected from V
high-frequency noise related to the GND. Connect a capacitor only to a
"clean" GND.
A resistor connected from this pin and the high-side MOSFET(s) drain sets
the peak-current-limit. The peak current is sensed through the high-side
MOSFET(s). The internal 100 µA current generator (I
from the drain through the external resistor (R
threshold is given by the following equation:
This pin is connected to the source of the high-side MOSFET(s) and
provides the return path for the high-side driver. This pin monitors the drop
across both the upper and lower MOSFET(s) for the current limit together
with OCH and OCL.
This pin is connected to the high-side MOSFET(s) gate.
Through this pin is supplied the high-side driver. Connect a capacitor from
this pin to the PHASE pin and a diode from V
versus BOOT).
This pin has to be connected closely to the low-side MOSFET(s) source in
order to reduce the noise injection into the device.
This pin is connected to the low-side MOSFET(s) gate.
5 V internally regulated voltage. It is used to supply the internal drivers.
Filter it to ground with at least 1 µF ceramic cap.
Supply voltage pin.
The operative supply voltage range is from 4.5 V to 14 V.
CC
to the device, but can be a low impedance path for the
I
VALLEY
I
PEAK
OCL
Function
=
=
). The over-current threshold is given by
I
--------------------------------- -
--------------------------------- -
2 R
OCH
I
R
OCL
•
Pin connections and functions
DSONHS
•
DSONLS
•
R
R
OCH
CCDR
OCL
OCH
OCL
). The over-current
) from this pin to ground
to this pin (cathode
OCH
) sinks a current
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