L5983TR STMicroelectronics, L5983TR Datasheet - Page 4

• Manufacturer Part Number: L5983TR
• Description: IC REG SW 1.5A STEPDOWN 8-VFQFPN
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L5983TR

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 0.6 ~ 18 V
• Current - Output: 1.5A
• Frequency - Switching: 250kHz ~ 1MHz
• Voltage - Input: 2.9 ~ 18 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-VFQFN, 8-VFQFPN
• Power - Output: 1.5W
• For Use With: 497-6386 - BOARD EVAL FOR L5983
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6860-2; L5983TR

Pin settings
1
1.1
1.2
4/43
Pin settings
Pin connection
Figure 2.
Pin description
Table 1.
N.
1
2
3
4
5
6
7
8
Pin connection (top view)
Pin description
SYNCH
COMP
Type
GND
OUT
F
V
INH
FB
SW
CC
Regulator output
Master/slave synchronization. When it is left floating, a signal with a
phase shift of half a period with respect to the power turn on is present at
the pin. When connected to an external signal at a frequency higher than
the internal one, then the device is synchronized by the external signal,
with zero phase shift.
Connecting together the SYNCH pin of two devices, the one with the
higher frequency works as master and the other as slave; so the turn on
of the two power switches has a phase shift of half a period.
A logical signal (active high) disables the device. With INH higher than
1.9 V the device is OFF and with INH lower than 0.6 V the device is ON.
Error amplifier output to be used for loop frequency compensation
Feedback input. Connecting the output voltage directly to this pin the
output voltage is regulated at 0.6 V. To have higher regulated voltages an
external resistor divider is required from Vout to the FB pin.
The switching frequency can be increased connecting an external
resistor from the FSW pin and ground. If this pin is left floating the deice
works at its free-running frequency of 250 kHz.
Ground
Unregulated DC input voltage
SYNCH
SYNCH
COMP
COMP
OUT
OUT
Doc ID 13005 Rev 7
INH
INH
Description
FB
FB
GND
GND
FSW
FSW
V
V
CC
CC
L5983