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LTC3499EDD Datasheet(PDF) 5 Page - Linear Technology

Part # LTC3499EDD
Description  750mA Synchronous Step-Up DC/DC Converters with Reverse-Battery Protection
Download  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3499EDD Datasheet(HTML) 5 Page - Linear Technology

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LTC3499/LTC3499B
5
3499f
Fixed Frequency Discontinous
Mode Operation
Soft-Start into 25
Ω Load
Load Transient 50mA to 200mA
TYPICAL PERFOR A CE CHARACTERISTICS T
A = 25°C unless noted.
Fixed Frequency Operation
Oscillator Frequency
vs Temperature
TEMPERATURE (
°C)
–50
1.0
1.1
1.2
1.3
1.4
–25
0
25
50
3499 G08
75
100
VIN and SW Reverse-Battery
Current vs VIN and SW Voltage
VOUT
50mV/DIV
20
µs/DIV
3499 G12
VIN = 2.4V
VOUT = 5V
L = 4.7
µH
COUT = 10µF
CFF = 10pF (FEEDFORWARD CAPACITOR FROM
VOUT TO FB)
IL
50mA/DIV
Burst Mode Operation
(LTC3499 Only)
VOUT
200mV/DIV
200
µs/DIV
3499 G13
VIN = 2.4V
VOUT = 5V
ILOAD = 50mA to 200mA
RZ = 100k
CF = 680pF
COUT = 10µF
L = 4.7
µH
ILOAD
100mA/DIV
200mA
50mA
VIN
2V/DIV
SS
2V/DIV
VOUT
2V/DIV
1ms/DIV
34991G15
VIN = 2.4V
VOUT = 5V
L = 4.7
µH
CSS = 0.01µF
COUT = 10µF
IL
200mA/DIV
VIN AND SW VOLTAGE (V)
–6
–1.0
0
–2
2
–4
0
4
3499 G11
6
–0.5
1.0
0.5
SHDN = 0V
VOUT = 0V
SW
2V/DIV
200ns/DIV
3499 G14
VIN = 2.4V
VOUT = 5V
L = 4.7
µH
IL
100mA/DIV
SW
2V/DIV
200ns/DIV
3499 G16
VIN = 2.4V
VOUT = 5V
L = 4.7
µH
IL
100mA/DIV
FB Voltage vs Temperature
TEMPERATURE (
°C)
–50
25
75
3499 G09
–25
0
50
1.2215
1.2210
1.2205
1.2200
1.2195
1.2190
1.2185
1.2220
1.2225
100


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