UC3845BD STMicroelectronics, UC3845BD Datasheet - Page 8

• Manufacturer Part Number: UC3845BD
• Description: Switching Converters, Regulators & Controllers 0.5mA Current Mode
• Manufacturer: STMicroelectronics

Specifications of UC3845BD

• Output Voltage: 4.90 V to 5.10 V
• Switching Frequency: 52 kHz
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Package / Case: SO-8
• Duty Cycle (max): 50 %
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Figure 16 : Under Voltage Lockout.
UC2842B/3B/4B/5B - UC3842B/3B/4B/5B
Figure 17 : Current Sense Circuit .
Peak current (i
A small RC filter may be required to suppress switch transients.
8/15
Figure 15 : Error Amp Configuration.
I
S max
V
i
1.0 V
R
R
s
S
S
) is determined by the formula
7
I
S
R
C
V
D95IN347
V
Z
OFF
ON
i
ON/OFF COMMAND
CURRENT
TO REST OF IC
SENSE
UC3842B
UC3844B
COMP
GND
16V
10V
Z
f
1
3
5
COMP
UC3843B
UC3845B
8.4V
7.6V
V
FB
ERROR
AMPL.
2
1
2.5V
<0.5mA
<17mA
D95IN346
+
-
I
2R
CC
R
V
OFF
1V
During UVLO, the Output is low
D95IN345
1mA
V
ON
COMPARATOR
CURRENT
SENSE
V
CC