Datasheet

CS
LOGIC
OUT
DRIVER
PWM
100k
50k
CLK
SS
V
CC
2k
CLK +LEB
80% MAX
DUTY LIMIT (-80)
50% MAX
DUTY LIMIT (-50)
COMP
OSC
RT
0.5V
0
45 PA
R
S
Q
Q
+
-
+
-
5k
1.4V
SS
FB
1.25V
5V
+
-
10 PA
SS
Slope
Compensation
Generator
-50 Device Has
No Slope
Compensation
CURRENT
LIMIT
V
IN
RTN
ARTN
OUT
LOCAL_EN
LT20V
10 PA
1.5V
VBG
Power OK
EN
SS
CS
RT
COMP
FB
+
-
+
-
Switch Mode
Power Supply
Controller
See
Figure 3
for Detail
V
CC
RCLP
V
EE
RCLASS
RSIG
Thermal Limit
1.5V
1.5V
EN
10V
V
IN
UVLORTN
5V
V
IN
+
-
+
-
+
-
+
-
Gate
Control
LOCKOUT
UVLO
2V
60V
+
-
2V
+
-
LM5070
www.ti.com SNVS308G –OCTOBER 2004–REVISED APRIL 2013
BLOCK DIAGRAMS
Figure 13. Top Level Block Diagram
Figure 14. PWM Controller Block Diagram
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