LT1054_15 Datasheet, PDF (10/16 Pages) Linear Technology – Switched-Capacitor Voltage Converter with Regulator

LT1054/LT1054L
Typical Applications
Basic Voltage Inverter
100µF
FB/SHDN V⁺
CAP⁺ OSC
LT1054
GND V_REF
CAP ^– V_OUT
V_IN
2µF
–V_OUT
100µF
LT1054 • TAO2
Basic Voltage Inverter/Regulator
V_IN 2µF
FB/SHDN V⁺
10µF
CAP⁺ OSC
LT1054
GND V_REF
CAP ^– V_OUT
R1
R2
0.002µF
) ) ^R2
R1
=
|V_OUT|
V_REF
2
–
40mV
+
1
=
|V_OUT|
1.21V
+
1
,
V_OUT
REFER TO FIGURE 5
100µF
LT1054 • TA03
100µF
Negative Voltage Doubler
V_IN
2µF
FB/SHDN V⁺
CAP⁺ OSC
LT1054
GND V_REF
CAP ^– V_OUT
+
V_OUT
–
Q_X*
100µF ^RX*
V_IN
V_IN = –3.5V TO –15V
V_OUT = 2V_IN + (LT1054 VOLTAGE LOSS) + (Q_X SATURATION VOLTAGE)
*SEE FIGURE 3
LT1054 • TAO4
Positive Doubler
+
V_OUT
50mA
–
1N4001
100µF
V_IN = 3.5V TO 15V
V_OUT ≈ 2V_IN – (V_L + 2V_DIODE)
V_L = LT1054 VOLTAGE LOSS
V_IN
1N4001 ^{3.5V TO 15V}
10µF
FB/SHDN V⁺
CAP⁺ OSC
LT1054
GND V_REF
CAP ^– V_OUT
2µF
LT1054 • TAO5
100mA Regulating Negative Doubler
V_IN
3.5 TO 15V
2.2µF
10µF
1N4002
10µF
1N4002
FB/SHDN V⁺
CAP⁺ OSC
LT1054 #1
GND V_REF
CAP ^– V_OUT
V_OUT
SET
R1
40k
10µF
10µF
1N4002
FB/SHDN V⁺
CAP⁺ OSC
LT1054 #2
GND V_REF
CAP ^– V_OUT
HP5082-2810
PIN 2
20k
LT1054 #1
1N4002
100µF
10µF
R2
0.002µF
500k
V_IN = 3.5 TO 15V
V_OUT MAX ≈ –2V_IN + [1054 VOLTAGE LOSS + 2(V_DIODE)]
1N4002
–V_OUT
I_OUT ≅ 100mA MAX
) ) ^R2
R1
=
|V_OUT|
V_REF
2
–
40mV
+
1
=
|V_OUT|
1.21V
+
1
, REFER TO FIGURE 5
10µF
LT1054 • TAO6
10
For more information www.linear.com/LT1054
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