UC384XBD MOTOROLA [Motorola, Inc], UC384XBD Datasheet - Page 14

• Manufacturer Part Number: UC384XBD
• Description: HIGH PERFORMANCE CURRENT MODE CONTROLLERS
• Manufacturer: MOTOROLA [Motorola, Inc]

14
1.0nF
1.0nF
10k
10k
The capacitor’s equivalent series resistance must limit the Drive Output current to 1.0 A. An additional series resistor
may be required when using tantalum or other low ESR capacitors. The converter’s output can provide excellent line
and load regulation by connecting the R2/R1 resistor divider as shown.
The capacitor’s equivalent series resistance must limit the Drive Output current to 1.0 A.
An additional series resistor may be required when using tantalum or other low ESR capacitors.
8(14)
8(14)
4(7)
2(3)
1(1)
4(7)
2(3)
1(1)
2.5V
2.5V
Amplifier
Amplifier
Error
Error
R
R
R
R
+
+
Osc
Osc
Internal
Internal
0.5mA
0.5mA
Bias
Bias
Figure 31. Voltage–Inverting Charge Pump Converter
2R
2R
R
R
3.6V
3.6V
Figure 30. Step–Up Charge Pump Converter
UC3845B
UC3845B
UC3844B, 45B UC2844B, 45B
5(9)
5(9)
1.0V
1.0V
–
–
+
+
Current Sense
Current Sense
Reference
Comparator
Reference
Comparator
Regulator
Regulator
UVLO
UVLO
V ref
V ref
OUTLINE DIMENSIONS
R
R
S
S
T
T
Q
Q
UVLO
V CC
UVLO
V CC
PWM
Latch
PWM
Latch
+
+
–
–
7(12)
7(12)
34V
34V
V in = 15V
7(11)
7(11)
6(10)
V in = 15V
6(10)
5(8)
3(5)
5(8)
3(5)
V O = 2.5
15
15
+
+
Connect to
Pin 2 for
closed loop
operation.
R2
R1
1N5819
10
10
MOTOROLA ANALOG IC DEVICE DATA
47
47
)
+
1
1N5819
1N5819
Output Load Regulation
I O (mA)
(Open Loop Configuration)
Output Load Regulation
18
32
1N5819
0
2
9
I O (mA)
R2
R1
18
36
0
2
9
+
+
47
47
V O (V)
–14.4
–13.2
–12.5
–11.7
–10.6
V O 2 (V in )
V O –V in
V O (V)
29.9
28.8
28.3
27.4
24.4