Datasheet

16
LTC1433/LTC1434
TYPICAL APPLICATIONS N
U
Negative Boost Converter
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SSW
NC
BSW
NC
SGND
RUN/SS
LBO
LBI
PWRV
IN
PGND
SV
IN

C
OSC

POR
I
TH

V
OSENSE

V
PROG
LTC1433
0.1µF
100µF*
16V
100µF*
16V
D1:MOTOROLA MBRS130LT3
L1: COILCRAFT DO3316 SERIES
V
OUT
–9V
V
IN
–3V TO –7V
D1
100pF
5.1k
50k
1%
310k
1%
6800pF
1433/34 TA05
68µF**
20V
0.1µF
680pF
100pF
* AVX TPSE107M016R0100
** AVX TPSE686M020R0150
L1
100µH
V
IN
(V)
–3
–4
–5
–6
–7
I
OUT(MAX)
(mA)
180
300
400
540
680
+
+
+
Ultralow Output Ripple 5V to –1.25V MR Head Amplifier Supply
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SSW
NC
BSW
NC
SGND
RUN/SS
LBO
LBI
PWRV
IN
PGND
SV
IN

C
OSC

POR
I
TH

V
OSENSE

V
PROG
LTC1433
100µF*
10V
0.1µF
0.1µF
100µF*
10V
D1: MOTOROLA MBRM5819
L1: SUMIDA CD54 SERIES
L2: J.W. MILLER PM20-R33M
*AVX TPSD107M010R0100
V
OUT

–1.25V
280mA
D1
L1
22µH
POWER-ON
RESET
V
IN
5V
680pF
100pF
5.1k
23.8k
1%
1.2k
1%
10k
6800pF
100pF
1433/34 TA04
100µF*
10V
L2
0.33µH
+ +
+