Datasheet

2
LTC1433/LTC1434
A
U
G
W
A
W
U
W
ARB
S
O
LU
T
EXI T
I
S
(Voltages Referred to PGND Pin)
Input Supply Voltage (PWRV
IN
, SV
IN
) ... 13.5V to –0.3V
DC Small Switch Current (SSW)......................... 100mA
Peak Small Switch Current (SSW) ..................... 300mA
Small Switch Voltage
(SSW)................................(V
IN
+ 0.3V) to (V
IN
– 13.5V)
DC Large Switch Current (BSW)....................... 600mA
Peak Large Switch Current (BSW) .......................... 1.2A
Large Switch Voltage
(BSW)................................(V
IN
+ 0.3V) to (V
IN
– 13.5V)
PLLIN, PLL LPF, I
TH
, C
OSC
........................2.7V to –0.3V
POR, LBO ..................................................12V to –0.3V
LBI, V
OSENSE
..............................................10V to –0.3V
RUN/SS, V
PROG
Voltages
V
IN
≥ 11.7V ...........................................12V to –0.3V
V
IN
< 11.7V...............................(V
IN
+ 0.3V) to –0.3V
Commercial Temperature Range
LTC1433C/LTC1434C .............................. 0°C to 70°C
Extended Commercial Operating Temperature
Range (Note 2) ....................................... –40°C to 85°C
Industrial Temperature Range (Note 3)
LTC1433I/LTC1434I ........................... –40°C to 85°C
Junction Temperature (Note 4)............................. 125°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
(Note 1)
WU
U
PACKAGE
/
O
RDER I FOR ATIO
ORDER PART
NUMBER
ORDER PART
NUMBER
LTC1433CGN
LTC1433IGN
LTC1434CGN
LTC1434IGN
T
JMAX
= 125°C, θ
JA
= 150°C/W
T
JMAX
= 125°C, θ
JA
= 150°C/W
1
2
3
4
5
6
7
8
TOP VIEW
GN PACKAGE
16-LEAD PLASTIC SSOP
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
Consult factory for Military grade parts.
1
2
3
4
5
6
7
8
9
10
TOP VIEW
GN PACKAGE
20-LEAD PLASTIC SSOP
20
19
18
17
16
15
14
13
12
11


NC
SSW
NC
BSW
SGND
NC
RUN/SS
NC
LBO
LBI
PWRV
IN
PGND
SV
IN

PLLIN
PLL LPF
C
OSC

POR
I
TH

V
OSENSE

V
PROG
ELECTRICAL CHARACTERISTICS
T
A
= 25°C, V
IN
= 10V, V
RUN/SS
= 5V, unless otherwise noted. (Notes 2, 3)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Main Control Loop
I
IN
V
OSENSE
Feedback Current V
PROG
Pin Open (Note 5) 10 50 nA
V
OSENSE
Regulated Output Voltage (Note 5)
1.19V (Adjustable) Selected V
PROG
Pin Open ● 1.178 1.190 1.202 V
3.3V Selected V
PROG
= 0V ● 3.220 3.300 3.380 V
5V Selected V
PROG
= V
IN
● 4.880 5.000 5.120 V
V
OVL
Output Overvoltage Lockout V
PROG
Pin Open 1.24 1.28 1.32 V
∆V
OSENSE
Reference Voltage Line Regulation V
IN
= 3.6V to 13V (Note 5), V
PROG
Pin Open 0.002 0.01 %/V
V
LOADREG
Output Voltage Load Regulation I
TH
Sinking 5µA (Note 5) ● 0.5 0.8 %
I
TH
Sourcing 5µA (Note 5) ● –0.5 –0.8 %