LTC3499_15 Datasheet, PDF (16/16 Pages) Linear Technology – 750mA Synchronous Step-Up DC/DC Converters with Reverse-Battery Protection

LTC3499/LTC3499B
TYPICAL APPLICATION
Two Cells to 3.3V, 250mA
L
4.7µH
V_IN +
2 AA CELLS
1.8V TO 3.2V
C_IN
2.2µF
×5R
V_IN
SW
LTC3499
ON OFF SHDN
V_OUT
100k
330pF
VC
FB
SS
GND
0.01µF
562k
332k
V_OUT
3.3V
250mA
C_OUT
10µF
×5R
C_IN: TAIYO YUDEN X5R JMK212BJ225MD
C_OUT: TAIYO YUDEN X5R JMK212BJ106MD
L: COILCRAFT MSS5131-472MB
3499 F06a
Two Cells to 5V Efficiency
100
100000
90
EFFICIENCY
80
10000
1000
70
100
60
50
40
0.1
10
POWER LOSS
V_IN = 3V ₁
V_IN = 2.4V
V_IN = 1.8V
0.1
1
10
100
1000
LOAD CURRENT (mA)
3499 F06b
RELATED PARTS
PART NUMBER
LT1930/LT1930A
LT1961
LTC3400/LTC3400B
LTC3401
DESCRIPTION
1A (I_SW), 1.2MHz/2.2MHz, High Efficiency Step-Up
DC/DC Converter
1.5A (I_SW), 1.25MHz, High Efficiency Step-Up
DC/DC Converter
600mA (I_SW), 1.2MHz, Synchronous Step-Up
DC/DC Converter
1A (I_SW), 3MHz, Synchronous Step-Up DC/DC Converter
LTC3402
2A (I_SW), 3MHz, Synchronous Step-Up DC/DC Converter
LTC3421
LTC3422
LTC3425
LTC3427
LTC3429/LTC3429B
LTC3458/LTC3458L
LTC3525
3A (I_SW), 3MHz, Synchronous Step-Up DC/DC Converter
with Output Disconnect
1.5A (I_SW), 3MHz, Synchronous Step-Up DC/DC
Converter with Output Disconnect
5A (I_SW), 8MHz, 4-Phase Synchronous Step-Up DC/DC
Converter with Output Disconnect
500mA (I_SW), 1.25MHz, Synchronous Step-Up DC/DC
Converter with Soft-Start/Output Disconnect
600mA (I_SW), 550kHz, Synchronous Step-Up DC/DC
Converters with Soft-Start/Output Disconnect
1.4A/1.7A (I_SW), 1.5MHz, Synchronous Step-Up DC/DC
Converter with Soft-Start/Output Disconnect
400mA (I_SW), Synchronous Step-Up DC/DC
Converter in SC70
COMMENTS
High Efficiency, V_IN: 2.6V to 16V, V_OUT(MAX) = 34V, I_Q = 4.2mA/5.5mA,
I_SD < 1µA, ThinSOT Package
90% Efficiency, V_IN: 3V to 25V, V_OUT(MAX) = 35V, I_Q = 0.9mA,
I_SD < 6µA, MS8E Package
92% Efficiency, V_IN: 0.5V to 5V, V_OUT(MAX) = 5V, I_Q = 19µA/300µA,
I_SD < 1µA, ThinSOT Package
97% Efficiency, VIN: 0.5V to 5V, V_OUT(MAX) = 5.5V, I_Q = 38µA,
I_SD < 1µA, 10-Lead MS Package
97% Efficiency, VIN: 0.5V to 5V, V_OUT(MAX) = 5.5V, I_Q = 38µA,
I_SD < 1µA, 10-Lead MS Package
95% Efficiency, V_IN: 0.5V to 4.5V, V_OUT(MAX) = 5.25V, I_Q = 12µA,
I_SD < 1µA, 24-Lead QFN Package
95% Efficiency, V_IN: 0.5V to 4.5V, V_OUT(MAX) = 5.25V, I_Q = 25µA,
I_SD < 1µA
95% Efficiency, V_IN: 0.5V to 4.5V, V_OUT(MAX) = 5.25V, I_Q = 12µA,
I_SD < 1µA, 32-Lead QFN Package
94% Efficiency, V_IN: 1.8V to 5V, V_OUT(MAX) = 5.25V, I_SD < 1µA,
DFN Package
92% Efficiency, V_IN: 0.5V to 4.3V, V_OUT(MAX) = 5V, I_Q = 20µA,
I_SD < 1µA, ThinSOT Package
93% Efficiency, V_IN: 1.5V to 6V, V_OUT(MAX) = 7.5V/6V, I_Q = 15µA,
I_SD < 1µA, DFN Package
94% Efficiency, V_IN: 0.5V to 4.5V, V_OUT(MAX) = 5.25V, I_Q = 7µA,
I_SD < 1µA, Output Disconnect
16 LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
3499fc
LT 0311 REV C • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2006