lt1432 Linear Technology Corporation, lt1432 Datasheet - Page 2

• Manufacturer Part Number: lt1432
• Description: 3.3v High Efficiency Step-down Switching Regulator Controller
• Manufacturer: Linear Technology Corporation

A
V
Device is in standard test loop unless otherwise noted.
LT1432-3.3
V
V
V
V
Diode Pin Voltage ................................................... 30V
Mode Pin Current (Note 2) ..................................... 1mA
Operating Temperature Range .................... 0 C to 70 C
Storage Temperature Range ................ –65 C to 150 C
Lead Temperature (Soldering, 10 sec)................. 300 C
PARAMETER
Regulated Output Voltage
Output Voltage Line Regulation
Input Supply Current (Note 1)
Quiescent Output Load Current
Mode Pin Current
Mode Pin Threshold Voltage
(Normal to Burst)
V
V
V
Current Limit Sense Voltage (Note 3)
V
Supply Current in Shutdown
Burst Mode Operation Output Ripple
Burst Mode Operation Average Output Voltage
Clamp Diode Forward Voltage
Start-up Drive Current
Restart Time Delay
Transconductance, Output to V
2
ELECTRICAL C
C
C
C
C
LIM
IN
+
C
LIM
BSOLUTE
Pin Saturation Voltage
Pin Maximum Sink Current
Pin Source Current
= 4V, V
Pin ..................................................................... 40V
........................................................................... 35V
Pin .................................................................... 30V
Pin Current
and V
IN
= 4V, V
OUT
Pins ................................................... 7V
+
W
= 8V, V
A
HARA TERISTICS
C
XI
Pin
DIODE
W
= Open, V
U
C
W
R
CONDITIONS
V
V
V
V
V
I
V
V
V
Device in Current Limit Loop
Device in Current Limit Loop
(Current Is Out of Pin)
V
Device in Burst Test Circuit
Device in Burst Test Circuit
I
V
V
(Note 4)
I
MODE
F
C
LIM
C
IN
IN
MODE
MODE
OUT
OUT
OUT
MODE
OUT
+
= 1mA, All Other Pins Open
= 150 A to 250 A
A
Current = 220 A
= V
= 4V to 30V
= 4V to 30V, V
= V
= 3.6V (Forced)
= 3.6V (Forced)
= 3.0V (Forced)
= 1.5V (Forced), V
TI
= 10 A (Out of Pin)
IN
= 0V (Current Is Out of Pin)
= 3.3V (Shutdown)
> 3V, V
OUT
– 1V, V
U
G
, V
IN
MODE
C
S
< 30V, V
= V
+
= V
IN
= 0V, T
IN
IN
– 1.5V
C
+ 5V, V
= 4V to 26V,
and V
PACKAGE/ORDER I FOR ATIO
Consult factory for Military and Industrial grade parts.
J
= 25 C
+
C
= 0V
= V
V
N8 PACKAGE
8-LEAD PDIP
V
T
T
OUT
LIM
V
IN
JMAX
JMAX
V
IN
+
+ 1V
= 100 C,
= 100 C,
1
2
3
4
TOP VIEW
JA
JA
= 150 C/W (N8)
= 170 C/W (S8)
8-LEAD PLASTIC SO
S8 PACKAGE
8
7
6
5
MODE
GND
V
DIODE
C
2700
3.24
0.45
3.15
MIN
0.6
0.7
35
56
30
30
U
LT1432CN8-3.3
LT1432CS8-3.3
3600
3.30
0.25
3.30
ORDER PART
TYP
100
0.3
0.9
0.9
0.8
0.5
1.2
60
30
15
60
45
15
45
5
NUMBER
W
MAX
5000
3.36
0.45
3.45
0.65
100
0.5
1.2
1.5
1.5
20
50
30
64
70
60
10
UNITS
mV
U
mho
mV
mA
mA
mA
mV
mA
ms
p-p
V
A
A
V
V
A
A
A
V
V