L6731D STMicroelectronics, L6731D Datasheet - Page 12

• 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

Device description
5.5
5.6
12/23
Error amplifier
Figure 5.
Soft-start
When both V
pin) the start-up phase takes place. Otherwise the SS pin is internally shorted to GND. At
start-up, a ramp is generated charging the external capacitor C
generator. The initial value for this current is 35 µA and charges the capacitor up to 0.5V.
After that it becomes 10 µA until the final charge value of approximately 4 V (see
Figure 6.
V
CCDR
Vss
Error amplifier reference
Device start-up: voltage at the SS pin
CC
DDR-IN
and V
100K
IN
are above their turn-ON thresholds (V
0.5V
2.5V
0.6V/250KHz
DDR-IN/2
250KHz
0.6V/500KHz
4V
IN
SS
1.25V
4.2V
is monitored by the OCH
with an internal current
Vcc
Vin
Error Amplifier Ref.
V
Figure
V
t
t
CC
IN
L6731D
6.).