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LTC3448 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC3448
Description  1.5MHz/2.25MHz, 600mA Synchronous Step-Down Regulator with LDO Mode
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3448 Datasheet(HTML) 5 Page - Linear Technology

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5
LTC3448
3448f
TYPICAL PERFOR A CE CHARACTERISTICS
(From Figure1a Except for the Resistive Divider Resistor Values)
RDS(ON) vs Temperature
Dynamic Supply Current
vs Supply Voltage
Dynamic Supply Current
vs Temperature
Switch Leakage vs Temperature
Switch Leakage vs Input Voltage
Start-Up from Shutdown
Load Step
Load Step
TEMPERATURE (
°C)
–50
0.4
0.5
0.6
25
75
3448 G10
0.3
0.2
–25
0
50
100
125
0.1
0
2.5V
3.6V
4.2V
MAIN SWITCH
2.5V
3.6V
4.2V
SYNCH SWITCH
SUPPLY VOLTAGE (V)
2
280
300
340
5
3448 G11
260
240
34
1.5MHz
2.25MHz
6
220
200
320
ILOAD = 0A
TA = 25°C
TEMPERATURE (
°C)
–50
280
300
320
25
75
3448 G12
260
240
–25
0
50
100
125
220
200
VIN = 3.6V
ILOAD = 0A
2.25MHz
1.5MHz
TEMPERATURE (
°C)
–50
200
250
350
25
75
3448 G13
150
100
–25
0
50
100
125
50
0
300
MAIN
SWITCH
VIN = 5.5V
RUN = 0V
SYNCHRONOUS
SWITCH
INPUT VOLTAGE (V)
0
0.001
0.01
0.1
1
10
12
3
4
3448 G14
56
MAIN
SWITCH
RUN = 0V
TA = 25°C
SYNCHRONOUS
SWITCH
RUN
5V/DIV
VOUT
1V/DIV
IL
500mA/DIV
VIN = 3.6V
VOUT = 1.5V
ILOAD = 600mA
40
µs/DIV
3448 G15
VOUT
200mV/DIV
AC COUPLED
IL
500mA/DIV
ILOAD
100mA/DIV
VIN = 3.6V
VOUT = 1.5V
ILOAD = 100µA TO 200mA
COUT = 10µF
10
µs/DIV
3448 G16
VOUT
100mV/DIV
AC COUPLED
IL
500mA/DIV
ILOAD
250mA/DIV
VIN = 3.6V
VOUT = 1.5V
ILOAD = 50mA TO 600mA
COUT = 10µF
10
µs/DIV
3448 G17



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