LTC1433 Linear Technology, LTC1433 Datasheet - Page 2

• Manufacturer Part Number: LTC1433
• Description: 450mA/ Low Noise Current Mode Step-Down DC/DC Converters
• Manufacturer: Linear Technology

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