L5970AD 데이터 시트보기 (PDF) - STMicroelectronics
부품명
상세내역
제조사
L5970AD Datasheet PDF : 11 Pages
| |||
L5970AD
Table 2. Thermal Data
Symbol
Parameter
Rth (j-amb) Thermal Resistance Junction to ambient
(*) Package mounted on board
Figure 3. Pin Connection (top view)
Max.
Value
120 (*)
Unit
°C/W
OUT
SYNC
INH
COMP
1
8
2
7
3
6
4
5
D98IN955
VCC
GND
VREF
FB
Table 3. Pin Description
N. Name
Description
1
OUT Regulator Output.
2
SYNC Master/Slave Synchronization. When it is open, a signal synchronous with the turn-off of the inter-
nal power 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.
Connecting together the SYNC pin of two devices, the one with the higher frequency works as
master and the other one, works as slave.
3
INH A logical signal (active high) disables the device. With IHN higher than 2.2V the device is OFF and with
INH lower than 0.8V, the device is ON.
If INH is not used the pin must be grounded. When it is open, an internal pull-up disables the device.
4
COMP E/A output to be used for frequency compensation.
5
FB Stepdown feedback input. Connecting the output voltage directly to this pin results in an output
voltage of 1.235V. An external resistor divider is required for higher output voltages (the typical
value for the resistor connected between this pin and ground is 4.7K).
6
VREF Reference voltage of 3.3V. No filter capacitor is needed to stability.
7
GND Ground.
8
VCC Unregulated DC input voltage.
Table 4. Absolute Maximum Ratings
Symbol
V8
V1
I1
V4, V5
V3
V2
Ptot
Tj
Tstg
Parameter
Input Voltage
Output DC voltage
Output peak voltage at t = 0.1µs
Maximum output current
Analog pins
INH
SYNC
Power dissipation at Tamb ≤ 60°C
Operating junction temperature range
Storage temperature range
Value
Unit
40
V
-1 to 40
V
-5 to 40
V
int. limit.
4
V
-0.3V to VCC
-0.3 to 4
V
0.75
W
-40 to 150
°C
-55 to 150
°C
2/11
Share Link: 