PQ1CY1032ZZ Sharp Microelectronics, PQ1CY1032ZZ Datasheet - Page 6

• Manufacturer Part Number: PQ1CY1032ZZ
• Description: IC REG CHOPPER ADJ 3.5A TO-263
• Manufacturer: Sharp Microelectronics
• Type: Step-Down (Buck), Invertingr

Specifications of PQ1CY1032ZZ

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.26 ~ 35 V, -1.26 ~ -30 V
• Current - Output: 3.5A
• Frequency - Switching: 150kHz
• Voltage - Input: 8 ~ 35 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: D²Pak, TO-263 (5 leads + tab)
• Power - Output: 35W
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 425-1767-5

Fig.17 Polarity Inversion Type Circuit Diagram
1. External connection
(1) Wiring condition is very important. Noise associated with wiring inductance may cause problems.
(2) High switching speed and low forward voltage type schottky barrier diode should be recommended for the catch-diode D
(3) The output ripple voltage is highly influenced by ESR (Equivalent Series Resistor) of output capacitor, and can be minimized by
(4) An inductor should not be operated beyond its maximum rated current so that it may not saturate.
(5) When voltage that is higher than V
Precautions for Use
For minimizing inductance, it is recommended to design the thick and short pattern (between large current diodos, input/output
capacitors, and terminal 1,2.) Single-point grounding (as indicated) should be used for best results.
because it affects the efficiency. Please select the diode which the current rating is at least 1.2 times greater than maximum
swiching current.
selecting Low ESR capacitor.
V
output capacitor (C
connect as the following circuit.
IN
5 to 30V
1
V
is shorted to GND in normal condition, there is the case that the device is broken since the charged electric charge in
IN
V
IN
1
PQ1CY1032Z
O
) flows into input side. In such case a schottly barrier diode or a silicon diode shall be recommended to
C
220 F
IN
C
1
1
IN
PQ1CY1032Z
2
PQ1CY1032Z
IN
1
, is applied to V
4
3
3
4
C
C
S
2
5
S
2
5
ON/OFF control signal
OUT
R
2
S
D
, there is the case that the device is broken. Especially, in case
L
D
65 H
L
C
O
3k
1k
R
R
2
1
R
R
2
1
2 200 F
C
O
V
O
V
PQ1CY1032Z
O
Load
5V
Load