UPC1935GR Datasheet PDF - NEC
| Part Number | UPC1935GR | |
| Description | DC-DC CONVERTER CONTROL IC | |
| Manufacturers | NEC | |
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DATA SHEET
BiCMOS INTEGRATED CIRCUIT
µ PC1935
DC-DC CONVERTER CONTROL IC
DESCRIPTION
The µ PC1935 is a low-voltage input DC-DC converter control IC that can configure a three-output (step-up × 2, inverted
output × 1) DC-DC converter at an input voltage of 3, 3.3, or 5 V.
Because of its wide operating voltage range, this IC can also be used to control DC-DC converters using an AC adapter
for input.
FEATURES
• Low supply voltage: 2.5 V (MIN.)
• Operating voltage range: 2.5 to 20 V (breakdown voltage: 30 V)
• Can control three output channels.
• Timer latch circuit for short-circuit protection.
• Ceramic capacitor with low capacitance (0.1 µ F) can be used for short-circuit protection.
• Dead times of channels 2 (step-up) and 3 (inverted output) can be set from external resistors. Dead time of channel 1
(step-up) is internally fixed to 85 %.
• Soft start of each channel can be set independently.
• Each channel can be turned ON/OFF independently.
ORDERING INFORMATION
Part Number
Package
µ PC1935GR
16-pin plastic TSSOP (5.72 mm (225))
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Not all devices/types available in every country. Please check with local NEC representative for
availability and additional information.
Document No. G13418EJ3V0DS00 (3rd edition)
Date Published March 2000 NS CP (K)
Printed in Japan
The mark 5 shows major revised points.
1998
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µ PC1935
1. ELECTRICAL SPECIFICATIONS
Absolute Maximum Ratings (unless otherwise specified, TA = 25 °C)
Parameter
Supply voltage
Output voltage
Output current (open drain output)
Total power dissipation
Operating ambient temperature
Storage temperature
Symbol
VCC
VO
IO
PT
TA
Tstg
Ratings
30
30
21
400
–20 to + 85
–55 to + 150
Unit
V
V
mA
mW
°C
°C
Caution Product quality may suffer if the absolute maximum rating is exceeded even momentarily for any
parameter. That is, the absolute maximum ratings are rated values at which the product is on the verge
of suffering physical damage, and therefore the product must be used under conditions that ensure
that the absolute maximum ratings are not exceeded.
Recommended Operating Conditions
Parameter
Supply voltage
Output voltage
Output current
Operating temperature
Oscillation frequency
Symbol
VCC
VO
IO
TA
fOSC
MIN.
2.5
0
−20
20
TYP.
MAX.
20
20
20
+85
800
Unit
V
V
mA
°C
kHz
Caution The recommended operating range may be exceeded without causing any problems provided that the
absolute maximum ratings are not exceeded. However, if the device is operated in a way that exceeds
the recommended operating conditions, the margin between the actual conditions of use and the
absolute maximum ratings is small, and therefore thorough evaluation is necessary. The recommended
operating conditions do not imply that the device can be used with all values at their maximum values.
Data Sheet G13418EJ3V0DS00
5
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| Information | Total 28 Pages | |
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| Download | [ UPC1935GR.PDF Datasheet ] | |
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