L5970AD STMicroelectronics, L5970AD Datasheet - Page 2

• Manufacturer Part Number: L5970AD
• Description: IC REG SW 1.5A STEP DOWN 8-SOIC
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L5970AD

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.24 ~ 35 V
• Current - Output: 1.5A
• Frequency - Switching: 500kHz
• Voltage - Input: 4.4 ~ 36 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Power - Output: 750mW
• Output Voltage: 35 V
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Low Dropout Operation: 100% DUTY CYCLE
• For Use With: 497-8849 - BOARD DEMO STW9N150 100W 3PHASE
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L5970AD
Table 2. Thermal Data
(*) Package mounted on board
Figure 3. Pin Connection (top view)
Table 3. Pin Description
Table 4. Absolute Maximum Ratings
2/11
R
Symbol
Symbol
V
th (j-amb)
N.
1
2
3
4
5
6
7
8
T
4
P
V
V
V
V
T
I
, V
stg
1
tot
8
1
3
2
j
5
COMP E/A output to be used for frequency compensation.
Name
SYNC
V
OUT
GND
V
INH
FB
REF
CC
Thermal Resistance Junction to ambient
Input Voltage
Output DC voltage
Output peak voltage at t = 0.1µs
Maximum output current
Analog pins
INH
SYNC
Power dissipation at T
Operating junction temperature range
Storage temperature range
Regulator Output.
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.
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.
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).
Reference voltage of 3.3V. No filter capacitor is needed to stability.
Ground.
Unregulated DC input voltage.
amb
COMP
SYNC
≤ 60°C
OUT
Parameter
Parameter
INH
1
2
3
4
D98IN955
Description
8
7
6
5
VCC
GND
VREF
FB
Max.
-0.3V to V
-40 to 150
-55 to 150
int. limit.
-0.3 to 4
-1 to 40
-5 to 40
120 (*)
Value
Value
0.75
40
4
CC
°C/W
Unit
Unit
°C
°C
W
V
V
V
V
V