L6731BTR STMicroelectronics, L6731BTR Datasheet - Page 12

• Manufacturer Part Number: L6731BTR
• Description: IC CTRLR ADJ STEP DOWN 16-TSSOP
• Manufacturer: STMicroelectronics

Specifications of L6731BTR

• 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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5099-2

Device description
5.5
Figure 5.
5.6
Figure 6.
12/24
Error amplifier
Soft start
When both V
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
initial value for this current is 35µA and charges the capacitor up to 0.5V. After that it becomes
10µA until the final charge value of approximately 4V (see
V s s
Error Amplifier Reference
Device start-up: Voltage at the SS pin.
V
CCDR
DDR-IN
CC
100K
and V
IN
are above their turn-ON thresholds (V
0 .5 V
2.5V
SS
with an internal current generator. The
0.6V/250KHz
DDR-IN/2
250KHz
0.6V/500KHz
Figure
4 V
IN
is monitored by the OCH pin)
6.).
1 .2 5 V
4 .2 V
Error Amplifier Ref.
V c c
V in
V
V
CC
IN
L6731B
t
t