pq1cz38m2z Sharp Microelectronics of the Americas, pq1cz38m2z Datasheet - Page 4

• Manufacturer Part Number: pq1cz38m2z
• Description: Chopper Regulator Built-in 300khz Oscillation Circuit
• Manufacturer: Sharp Microelectronics of the Americas

Chopper Regulators
Fig.10 Oscillation Frequency Fluctuation vs.
Fig.12 Threshold Voltage vs. Junction
Fig.14 Block Diagram
–10
2.5
1.5
0.5
10
–2
–4
–6
–8
3
2
1
0
8
6
4
2
0
–25
–25
Junction Temperature
Temperature
1
V
IN
0
0
Junction temperature T
Junction temperature T
Overcurrent
detection
Overheat
25
25
detection
circuit
circuit
V
TH(ON)
V
V
TH(L)
50
50
TH(H)
75
75
j
j
(°C)
(˚C)
V
V
V
regulator
Voltage
100
100
IN
O
IN
F/F
=5V
PWM COMP.
=12V
=12V
3
125
125
Q
S
R
COM
_
+
ON/OFF
circuit
Fig.11 Overcurrent Detecting Level
Fig.13 Operating Dissipation Current vs.
+
_
ERROR AMP.
12
10
–2
–6
–8
–4
8
6
4
2
0
6
4
2
0
–25
V
0
ref
Fluctuation vs. Junction Temperature
Input Voltage
I
O
=0.1A
0
Junction temperature T
10
Input voltage V
I
25
O
=0.5A
2
5
4
20
50
V
ON/OFF control
O
OUT
adj
IN
75
(V)
PQ1CZ38M2Z
30
j
(°C)
T
V
100
j
O
=25˚C
=5V
125
40