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LTC3440EMS#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
LTC3440
16
3440fd
For more information www.linear.com/LTC3440
3-Cell to 3.3V at 600mA Converter
3-Cell to 3.3V Efficiency
typical applications
SW1
V
IN
SHDN/SS
MODE/SYNC
R
T
SW2
V
OUT
FB
V
C
GND
3
7
8
2
1
4
6
9
10
5
LTC3440
L1
4.7µH
D1
R3 15k
R5
10k
R1
340k
R2
200k
3440 TA03a
R
T
45.3k
f
OSC
= 1.5MHz
C1: TAIYO YUDEN JMK212BJ106MG
C2: TAIYO YUDEN JMK325BJ226MM
D1, D2: CENTRAL SEMICONDUCTOR CMDSH2-3
L1: SUMIDA CDR43-4R7M
*1 = Burst Mode OPERATION
0 = FIXED FREQUENCY
C1
10µF
3 CELLS
V
IN
=
2.7V TO 4.5V
*
C4 150pF
C3
33pF
D2
C5 10pF
C2
22µF
V
OUT
3.3V
600mA
+
OUTPUT CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.1 10 100 1000
3440 TA03b
0
1
Burst Mode
OPERATION
V
IN
= 2.7V
V
IN
= 3.3V
f
OSC
= 1.5MHz
V
IN
= 4.5V
LTC3440
17
3440fd
For more information www.linear.com/LTC3440
typical applications
Low Profile (<1.1mm) Li-Ion to 3.3V at 200mA Converter
SW1
V
IN
SHDN/SS
MODE/SYNC
R
T
SW2
V
OUT
FB
V
C
GND
3
7
8
2
1
4
6
9
10
5
LTC3440
L1
4.7µH
R1
340k
R2
200k
R3
15k
3440 TA04a
R
T
30.1k
C1: TAIYO YUDEN JMK212BJ475MG
C2: TAIYO YUDEN JMK212BJ475MG
L1: COILCRAFT LPO1704-472M
*1 = Burst Mode OPERATION
0 = FIXED FREQUENCY
f
OSC
= 2MHz
C1
4.7µF
Li-Ion
V
IN
= 2.5V TO 4.2V
*
+
C4
1.5nF
C2
4.7µF
V
OUT
3.3V
200mA
OUTPUT CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.1 10 100 1000
3440 TA04b
0
1
Burst Mode
OPERATION
V
IN
= 2.5V
V
IN
= 3.3V
V
IN
= 4.2V
Efficiency
3-Cell to 5V Boost Converter with Output Disconnect
SW1
V
IN
SHDN/SS
MODE/SYNC
R
T
SW2
V
OUT
FB
V
C
GND
3
7
8
2
1
4
6
9
10
5
LTC3440
L1
10µH
R1
619k
R2
200k
3440 TA06a
R
T
60.4k
C1: TAIYO YUDEN JMK212BJ106MG
C2: TAIYO YUDEN JMK325BJ226MM
D1: ON SEMICONDUCTOR MBRM120T3
L1: SUMIDA CDRH4D28-100
*1 = Burst Mode OPERATION
0 = FIXED FREQUENCY
** LOCATE COMPONENTS AS
CLOSE TO IC AS POSSIBLE
C1
10µF
C3
0.1µF
3
CELLS
R4 1M
V
IN
=
2.7V TO 4.5V
*
SD
C4
1.5nF
15k
f
OSC
= 1MHz
C2**
22µF
V
OUT
5V
300mA
+
D1**
OUTPUT CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.1 10 100 1000
3440 TA06b
0
1
Burst Mode
OPERATION
V
IN
= 2.7V
f
OSC
= 1MHz
V
IN
= 3.6V
V
IN
= 4.5V
3-Cell to 5V Boost Efficiency
LTC3440
18
3440fd
For more information www.linear.com/LTC3440
typical applications
SW1
V
IN
SHDN/SS
MODE/SYNC
R
T
SW2
V
OUT
FB
V
C
GND
3
7
8
2
1
4
6
9
10
5
LTC3440
L1
3.3µH
R1
340k
R5
10k
R2
200k
R3 15k
D1**
3440 TA07a
R
T
30.1k
C1, C2: TAIYO YUDEN JMK212BJ106MM
D1: ON SEMICONDUCTOR MBRM120T3
L1: SUMIDA CDRH4D28-3R3
*1 = Burst Mode OPERATION
0 = FIXED FREQUENCY
** LOCATE COMPONENTS AS
CLOSE TO IC AS POSSIBLE
C1
10µF
f
OSC
= 2MHz
Li-Ion
V
IN
=
2.5V TO 4.2V
*
+
C4 150pF
C5 10pF
C2**
10µF
V
OUT
0.4V TO 5V
C3
33pF
V
OUT
= 3.3V – 1.7V • (V
DAC
– 1.22V)
R6
200k
DAC
WCDMA Power Amp Power Supply with Dynamic Voltage Control Efficiency of the WCDMA
Power Amp Power Supply
INPUT VOLTAGE (V)
2.5
EFFICIENCY (%)
92
96
100
4.5
3440 TA07b
88
84
90
94
98
86
82
80
3
3.5
4
5
V
OUT
= 3.4V
I
OUT
= 100mA
I
OUT
= 250mA
I
OUT
= 600mA
SW1
V
IN
SHDN/SS
MODE/SYNC
R
T
SW2
V
OUT
FB
V
C
GND
3
7
8
2
1
4
6
9
10
5
LTC3440
L1
10µH
R5
24k
3440 TA08
R
T
60.4k
R
S
0.1Ω
R4
1k
C1: TAIYO YUDEN JMK212BJ106MG
C2: TAIYO YUDEN JMK325BJ226MM
L1: SUMIDA CDRH-4D28-100
*1 = Burst Mode OPERATION
0 = FIXED FREQUENCY
C1
10µF
V
IN
2.5V TO 5.5V
USB/PCMCIA POWER
500mA MAX
*
V
OUT
3.6V
2A
(PULSED)
C5
10nF
R6
130k
R1
392k
R2
200k
–
+
1/2 LT1490A
2N3906
–
+
1/2 LT1490A
1N914
C6 TO C9
470µF
×4
1.22 • R4
R5 • R
S
I
CURRENTLIMIT
=
GSM Modem Powered from USB or PCMCIA with 500mA Input Current Limit
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22

LTC3440EMS#PBF

Mfr. #:
Buy LTC3440EMS#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 500mA Synch. Buck-Boost Converter
Lifecycle:
New from this manufacturer.
Delivery:
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