GS7660IS PDF даташит
Спецификация GS7660IS изготовлена «Vishay Siliconix» и имеет функцию, называемую «Switched-Capacitor Voltage Converter». |
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Детали детали
Номер произв | GS7660IS |
Описание | Switched-Capacitor Voltage Converter |
Производители | Vishay Siliconix |
логотип |
9 Pages
No Preview Available ! |
GS7660
New Product
Vishay
formerly General Semiconductor
Switched-Capacitor Voltage Converter
8 Pin Dip
SO-8
Features
• Low output impedance ( typical 35Ω at VIN = 5V )
• Low quiescent current ( typical 36µA at VIN = 5V)
• High power conversion efficiency ( typical 98% )
• Simple and accurate voltage conversion from
positive to negative polarities
• Improved latch-up protection
• No external diodes required
Applications
• – 5V supply from + 5V logic supply
• EIA/TIA – 232E and EIA/TIA – 562 power supplies
• Portable telephones
• Data acquisition systems
• Personal communications equipment
• Panel meters
• Handheld instruments
Description
The GS7660 is a monolithic CMOS switched capacitor
voltage converter, designed to be an improved direct
replacement of the popular ICL7660, MAX1044 and
LTC1044. They perform supply voltage conversions from
positive to negative for an input voltage range of +1.5V to
+6.0V to their negative complements of –1.5V to –6.0V.
The input voltage can also be doubled (VOUT = 2VIN),
halved (VOUT = VIN/2), or multiplied (VOUT = ± n.VIN).
Contained on the chip are a series Power Supply regula-
tor, Oscillator, control Circuitry and four Power MOS
Switches. The oscillator, when unloaded, oscillates at a
nominal frequency of 10 kHz, with an Input voltage of 5.0V.
This frequency can be lowered by the addition of an external
capacitor to the “Osc” terminal or overdriven by an external
frequency source.
An Oscillator “boost” function is available to increase the
oscillator frequency which will optimize performance of
certain parameters. The Lv input can be connected to
ground to improve low voltage operation (VIN ≤ 3V), or left
open for input voltages greater than 3V to reduce power
dissipation.
The GS7660 provides superior performance over earlier
designs by combining low output impedance and low qui-
escent current with high efficiency and by eliminating diode
voltage drop losses. The only external components
required are two low cost electrolytic capacitors.
Typical Application Circuit
VIN (1.5V to 6V)
10µF +
C1
15
26
GS7660
37
Required for
VIN 3V
4 8 VOUT = --VIN
10µF
+ C2
Negative Voltage Converter
Document Number 74819
24-May-02
www.vishay.com
1
No Preview Available ! |
GS7660
Vishay
formerly General Semiconductor
Ordering Information
Order
Number
Pin Configuration
Boost 1
Cap+ 2
GND 3
Cap-- 4
Top View
8 VIN
7 OSC
6 LV
5 VOUT
Boost 1
Cap+ 2
GND 3
Cap-- 4
Top View
8 VIN
7 OSC
6 LV
5 VOUT
GS7660x x
Package Outline
P: Plastic Dip
S: SO-8
Operating Junction
Temperature Range
I: –40°C to +125°C
Test Circuit
+
10 µF
C1
1 BOOST
VIN 8
2 CAP+
OSC 7
GS7660
3 GND
LV 6
4 CAP-
VOUT 5
www.vishay.com
2
IS
COSC
External
Oscillator
VIN
IL
RL
VOUT
C2
10 µF
+
Document Number 74819
24-May-02
No Preview Available ! |
GS7660
Vishay
formerly General Semiconductor
Maximum Ratings Ratings at 25°C ambient temperature unless otherwise specified.
Parameter
Symbol
Value
Unit
Supply Voltage (VIN to GND)
Input Voltage (Pin 1, 6 and 7)
VIN 6.0
VIN –0.3V ≤ VIN ≤ (VIN, +0.3V)
V
V
LV Input Current
LV1 20 µA
Output Short Circuit Duration
Continuous
Operating Junction Temperature Range
TJ –40 to +125 °C
Storage Temperature Range
TS –65 to +150 °C
Continuous Power Dissipation
Plastic Dip (Derate 7.9mW/°C above 70°C)
SO-8 (Derate 6mW/°C above 70°C)
PD 630 mW
480
Note: (1) Stresses beyond those listed above may cause permanent damage to the device. Operating at the levels stated above may affect device reliabllity.
Electrical Characteristics VIN = 5.0V LVPin = open, Oscillator free running, I load = 0mA, TA = –40°C to +125°C unless otherwise noted.
Parameter
Conditions
Min Typ Max Unit
Supply Current
LV = Open
TA = 25°C
–
–
36 70
– 100 µA
Pin 1,7, VIN = 3V
– 20 –
Supply Voltage(1)
RL = 10KΩ, LV Open
RL = 10KΩ, LV Gnd
3.0
1.5
–
–
6.0
6.0
V
Output Resistance
IL = 20mA, FOSC = 10kHz TA = 25°C
LV = Open
IL = 3mA, FOSC = 1kHz TA = 25°C
VIN = 2V, LV to Gnd
–
–
–
–
35 70
– 110
– 250
– 370
Ω
Oscillator Frequency
COSC = 0pF, LV to Gnd
Pin 1 Open
VIN = 5.0V
VIN = 2.0V
–
2.0
5.0
–
– kHz
–
Power Efficiency
RL = 5K, FOSC =10kHz, LV = Open
96
98
–
%
Voltage Conversion Efficiency
LV = Open
TA = 25°C
98
99.9
–
%
Oscillator Sink or
Source Current
VOSC = 0V or VIN
LV = Open
Pin 1 = 0V
Pin 1 = VIN
–
–
– 3.0 µA
– 20
Oscillator Impedance
VIN = 2.0V
–
1.0
–
mΩ
TA = 25°C
VIN = 5.0V
–
100
–
kΩ
Note: (1) The GS7660 can operate with or without an external output diode over the full temperature and voltage range. Eliminating the diode reduces voltage
drop losses.
Document Number 74819
24-May-02
www.vishay.com
3
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