Datasheet

12
LT3439
sn3439 3439fs
LT/TP 0303 2K • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2002
RELATED PARTS
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
●
www.linear.com
PART NUMBER DESCRIPTION COMMENTS
LT1533 Slew Rate Controlled Ultralow Noise 1A Switching Regulator V
IN
: 2.7V to 23V, I
Q
(Supply): 12mA, I
SD
: <12µA, SO-16, Low
Noise: <100µV
P-P
, Independent Control of Switch Voltage and
Current Slew Rates
LT1534/LT1534-1 Slew Rate Controlled Ultralow Noise 2A Switching Regulators V
IN
: 2.7V to 23V, I
Q
(Supply): 12mA, I
SD
: <12µA, SO-16, Low
Noise: <2mV
P-P
, Independent Control of Switch Voltage and
Current Slew Rates
LT1683 Slew Rate Controlled Ultralow Noise Push-Pull Controller V
IN
: 2.7V to 20V, I
Q
(Supply): 25mA, I
SD
: <24µA, SSOP-20, Low
Noise: <200µV
P-P
, Independent Control of Switch Voltage and
Current Slew Rates
LT1738 Slew Rate Controlled Ultralow Noise DC/DC Controller V
IN
: 2.7V to 20V, I
Q
(Supply): 12mA, I
SD
: <24µA, SSOP-20, Greatly
Reduced Conducted and Radiated EMI, Independent Control of
Switch Voltage and Current Slew Rates
LT1763 500mA, Low Noise Micropower, LDO V
IN
: 1.8V to 20V, V
OUT(MIN)
: 1.22V, Dropout Voltage (V at I
OUT
):
0.30V, I
Q
(Supply): 30µA, V
OUT
: 1.5V, 1.8V, 2.5V, 3V, 3.3V, 5V,
I
SD
: <1µA, SO-8, Low Noise: <20µV
RMSP-P
LT1764/LT1764A 3A, Low Noise, Fast Transient Response, LDOs V
IN
: 2.7V to 20V, V
OUT(MIN)
: 1.21V, Dropout Voltage (V at I
OUT
):
0.34V, I
Q
(Supply): 1mA, V
OUT
: 1.8V, 2.5V, 3.3V, I
SD
: <1µA,
DD, TO220-5, Low Noise: <40µV
RMSP-P
, “A” Version Stable with
Ceramic Capacitors
LT1962 300mA, Low Noise Micropower, LDO V
IN
: 1.8V to 20V, V
OUT(MIN)
: 1.22V, Dropout Voltage (V at I
OUT
):
0.27V, I
Q
(Supply): 30µA, V
OUT
: 1.5V, 1.8V, 2.5V, 3V, 3.3V, 5V,
I
SD
: <1µA, MS8, Low Noise: <20µV
RMSP-P
LT1963/LT1963A 1.5A, Low Noise, Fast Transient Response, LDOs V
IN
: 2.1V to 20V, V
OUT(MIN)
: 1.21V, Dropout Voltage (V at I
OUT
):
0.34V, I
Q
(Supply): 1mA, V
OUT
: 1.5V, 1.8V, 2.5V, 3.3V, I
SD
: <1µA,
DD, TO220-5, SOT-223, SO-8, Low Noise: <40µV
RMSP-P
, “A” Version
Stable with Ceramic Capacitors
LT1964 200mA, Low Noise Micropower, Negative LDO V
IN
: –0.9V to –20V, V
OUT(MIN)
: –1.21V, Dropout Voltage (V at I
OUT
):
0.34V, I
Q
(Supply): 30µA, V
OUT
: Adj, –5V, I
SD
: <3µA, ThinSOT
TM
,
Low Noise: <30µV
RMSP-P
, Stable with Ceramic Capacitors
ThinSOT is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
U
Low Noise 12V to –12V, 6W Push-Pull DC Transformer
V
IN
SHDN
3
14
D2
D1
T1
47
6
5
11
V
IN
12V
1, 16
13
C1
4.7µF
C2
0.1µF
C3
15µF
C4
15µF
L2
33µH
V
OUT
–12V
500mA
C
T
680pF
10
LT3439
SYNC
C
T
R
T
16.9k
C1: TDK C3216X5R1C475K
C3, C4: TDK C4532X5R1E156M
C5: TEK C3216X5R1C475K
D1, D2: MBRA130LT3
L1: COILCRAFT DO1608C-333
T1: COILTRONICS CTX02-16076
R
SI
16.9k
3439 TA03
R
T
COLA
COLB
R
SL
GND PGND
•
•
•
•
IN
I
LIM2
I
LIM4
OUT
LT1175
OPTIONAL
SENSE
GND
R1
150k
C5
4.7µF
R2
324k