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参数资料
| 型号： | L6902D013TR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 3.2 A SWITCHING REGULATOR, 287 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | SO-8 |
| 文件页数： | 2/7页 |
| 文件大小： | 125K |
| 代理商： | L6902D013TR |
L6902D
2/7
3 DESCRIPTION (continued)
Other protections beside thermal shutdown complete the device for a safe and reliable application: overvoltage
protection, frequency folback overcurrent protection and protection vs. feedback disconnection.
The internal fixed switching frequency of 250KHz, and the SO-8 package pin allow to built an ultra compact DC/
DC converter with a minimum board space.
Figure 3. Pin Connection
Table 2. Pin Description
Table 3. Thermal Data
(*) Package mounted on board.
Table 4. Absolute Maximum Ratings
N°
Pin
Function
1
OUT
Regular Output
2
CS+
Current Error Amplifier input (current sense at higher voltage)
3
CS-
Current Error Amplifier input (current sense at lower voltage)
4
COMP
E/A output to be used for frequency compensation
5
FB
Stepdown feedback input. Connecting directly to this pin results in an output voltage of 1.235V.
An external resistive divider is required for higher output voltages. In this case:
6VREF
3.3V VREF. No cap is need for stability.
7
GND
Ground
8
VCC
Unregulated DC input voltage.
Symbol
Parameter
Value
Unit
Rth j-amb
Thermal Resistance Junction to Ambient Max.
110 (*)
°C/W
Symbol
Parameter
Value
Unit
V8
Input Voltage
40
V
V1
Output DC voltageOutput peak voltage at t = 0.1
s
-1 to 40
-5 to 40
V
I1
Maximum output current
Internally limited
V4, V5
Analog pins
4
V
V2, V3
Analog pins
-0.3V to VCC
V
Ptot
Power dissipation at Tamb ≤ 70 °C
0.7
W
Tj
Operating junction temperature range
-40 to 150
°C
Tstg
Storage temperature range
-55 to 150
°C
8
6
4
7
3
2
5
1
OUT
CS+
CS-
COMP
VCC
GND
VREF
FB
V
out
V
FB
1
R1
R2
--------
+
1.235 V 1
R1
R2
--------
+
==
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