lt3460esc6-trpbf Linear Technology Corporation, lt3460esc6-trpbf Datasheet - Page 4

• Manufacturer Part Number: lt3460esc6-trpbf
• Description: 1.3 Mhz/650khz Step-up Dc/dc Converter In Sc70 And Thinsot
• Manufacturer: Linear Technology Corporation

LT3460/LT3460-1
TYPICAL PERFORMANCE CHARACTERISTICS
PIN FUNCTIONS
SW (Pin 1/Pin 1/Pin 3): Switch Pin. Connect inductor/diode
here. Minimize trace at this pin to reduce EMI.
GND (Pin 2/Pins 2 and 5/Exposed Pad Pin 7): Ground
Pin. Tie directly to local ground plane.
FB (Pin 3/Pin 3/Pin 1): Feedback Pin. Reference
voltage is 1.255V. Connect resistor divider tap here.
Minimize trace area at FB. Set V
V
4
OUT
= 1.255V (1 + R1/R2).
350
300
250
200
150
100
400
30
25
20
15
10
50
5
0
0
–50
–50
Feedback Bias Current
Switch Saturation Voltage
(V
CESAT
I
I
I
I
–25
C
C
C
C
–25
= 250mA
= 200mA
= 100mA
= 50mA
(ThinSOT/SC70/DFN Packages)
)
TEMPERATURE (°C)
TEMPERATURE (°C)
0
0
(LT3460)
(LT3460)
(LT3460-1)
(LT3460)
25
25
OUT
50
50
according to
75
75
3460 G04
3460 G06
100
100
SHDN (Pin 4/Pin 4/Pin 6): Shutdown Pin. Tie to 1.5V or
higher to enable device; 0.4V or less to disable device.
Also functions as soft-start. Use RC fi lter (47k, 47nF typ)
as shown in Figure 1.
V
bypassed.
NC (NA/NA/Pins 2, 5): No-Connects. These pins are not
connected to internal circuitry. They should be tied to
ground to improve thermal and electrical performance.
IN
1.260
1.255
1.250
1.245
1.240
450
400
350
300
250
200
150
100
50
(Pin 5/Pin 6/Pin 4): Input Supply Pin. Must be locally
0
–50
0
Feedback Voltage
Current Limit vs Duty Cycle
–25
0.2
TEMPERATURE (°C)
0
0.4
DUTY CYCLE
25
0.6
50
LT3460
LT3460-1
0.8
75
3460 G07
3460 G05
100
1.0
3460fb