LT1054_15 Datasheet, PDF (21/33 Pages) Linear Technology – Switched-Capacitor Voltage Converter with Regulator

www.ti.com
System Examples (continued)
5 μF
+
12 V
LT1054
SLVS033G – FEBRUARY 1990 – REVISED JULY 2015
10 Ω
1/2 W
1
FB/SD
8
V_CC
2
CAP+
7
OSC
R1
LT1054 #1
3
6 ^{39.2 kΩ}
GND
V_REF
0.002 μF
+
1
FB/SD
10 Ω
1/2 W ₂
CAP+
8
V_CC
7
OSC
+
10 μF
LT1054 #2
3
6
GND
V_REF
20 kΩ
HP5082-2810
4
+
CAP−
10 μF
5
V_OUT
R2
200 kΩ
4
CAP−
5
V_OUT
+ ^{200 μF}
æ
ö
R2
=
ç
R1ç
çèç
V_OUT
V_{REF - 40}
2
mV
+
÷
1÷
÷ø÷
=
æ
R1_ççè
V_OUT
1.21 V
ö
+ 1_÷÷ø
V_O = −5 V
I_O = 0-200 mA
Pin numbers shown are for the P package.
Figure 26. Regulating 200-mA +12-V to −5-V Converter
5 μF
+
15 V
11
20 kΩ
16
AD558
+
10 μF
1
FB/SD
8
V_CC
2.5 V
LT1004-2.5 ₁₅
2
CAP+
7
OSC
LT1054
3
6
GND
V_REF
20 kΩ
4
CAP−
5
V_OUT
100 μF
+
V_O = −V_I (Programmed)
14 13 12
Pin numbers shown are for the P package.
Figure 27. Digitally Programmable Negative Supply
Digital
Input
Copyright © 1990–2015, Texas Instruments Incorporated
Product Folder Links: LT1054
Submit Documentation Feedback
21