LTC1046_15 Datasheet, PDF (3/12 Pages) Linear Technology – 5V to –5V Converter

ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which
the life of the device may be impaired.
Note 2: Connecting any input terminal to voltages greater than V⁺ or
less than ground may cause destructive latch-up. It is recommended
that no inputs from sources operating from external supplies be
applied prior to power-up of the LTC1046.
LTC1046
Note 3: R_OUT is measured at T_J = 25°C immediately after power-on.
Note 4: f_OSC is tested with C_OSC = 100pF to minimize the effects of test
fixture capacitance loading. The 0pF frequency is correlated to this 100pF
test point, and is intended to simulate the capacitance at pin 7 when the
device is plugged into a test socket and no external capacitor is used.
TYPICAL PERFOR A CE CHARACTERISTICS (Using Test Circuit in Figure 1)
Output Resistance vs
Oscillator Frequency
500
400
TV_A+
=
=
25°C
5V
I_L = 10mA
300
C1 = C2
= 1µF
200
C1 = C2
= 100µF
C1 = C2
= 10µF
100
0
100
1k
10k
100k
OSCILLATOR FREQUENCY, f_OSC (Hz)
1046 G01
Power Conversion Efficiency vs
Load Current for V⁺ = 2V
100
10
90
P_EFF
9
80
8
70
7
I_S
60
6
50
5
40
4
30
20
10
0
01
3
TV_A+
=
=
25°C
2V
2
C1 = C2 = 10µF ₁
f_OSC = 8kHz
0
2 3 4 5 6 7 8 9 10
LOAD CURRENT, I_L (mA)
1046 G04
Output Resistance vs
Supply Voltage
1000
T_A = 25°C
I_L = 3mA
C_OSC = 100pF
100
C_OSC = 0pF
10
0
1 23 4 567
SUPPLY VOLTAGE, V⁺ (V)
1046 G02
Power Conversion Efficiency vs
Load Current for V⁺ = 5V
100
100
90
90
P_EFF
80
80
70
70
60
60
50
50
I_S
40
40
30
30
20
VT^A+
=
=
25°C
5V
20
10
C1 = C2 = 10µF ₁₀
f_OSC = 30kHz
0
0
0 10 20 30 40 50 60 70
LOAD CURRENT, I_L (mA)
1046 G05
Output Resistance vs
Temperature
80
C1 = C2 = 10µF
70
60
V⁺ = 2V, C_OSC = 0pF
50
40
V⁺ = 5V, C_OSC = 0pF
30
20
10
–55 –25 0 25 50 75 100 125
AMBIENT TEMPERATURE (°C)
1046 G03
Power Conversion Efficiency vs
Oscillator Frequency
100
98
A
96
94
C
92
B
90
E
88
A = 100µF, 1mA
B = 100µF, 15mA
C = 10µF, 1mA
D = 10µF, 15mA
E = 1µF, 1mA
F = 1µF, 15mA
V ⁺ = 5V
T_A = 25°C
C1 = C2
86
84
D
F
82
80
100
1k
10k
100k
1M
OSCILLATOR FREQUENCY, f_OSC (Hz)
1046 G06
1046fb
3