LTC3250 Datasheet, PDF (12/12 Pages) Linear Technology – High Efficiency, Low Noise, Inductorless Step-Down DC/DC Converter

LTC3250-1.5/LTC3250-1.2
TYPICAL APPLICATIO
Multiple High Efficiency Outputs from Single Li-Ion Battery
Li-Ion
1µF
5 _VIN
V_OUT ¹
3
LTC3200-5
SHDN
C⁺
6
2 _GND
C^{– 4}
1µF
5V
100mA
1µF
10µF
10µF
7 _VIN
OUT ⁶
2 _MODE
SW1 ³
8
LTC3440
SHDN
SW2
4
60k _{1 RT}
FB ⁹
10µH
5 _GND
V_C ¹⁰
120k
300pF
1
V_IN
6
OUT
8
LTC1911-1.8
SHDN
C1⁺
7
2 _C2+
C1^{– 5}
1µF
1µF
3 _C2–
4
GND
22µF
340k
200k
10µF
3.3V
500mA
1.8V
250mA
OFF ON
1µF
1 _VIN
3 _SHDN
5
OUT
C^{+ 6}
LTC3250-1.5
1µF
2 _GND
C^{– 4}
4.7µF
1.5V
250mA
3250-1.5 TA04
RELATED PARTS
PART NUMBER
DESCRIPTION
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300mA (I_OUT), 1.5MHz, Synchronous Step-Down
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LTC3406/LTC3406B
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LTC3411
1.25A (I_OUT), 4MHz, Synchronous Step-Down
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LTC3440
600mA (I_OUT), 2MHz, Synchronous Buck-Boost
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12 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^q FAX: [phone] ^q www.linear.com
COMMENTS
V_IN: 2.7V to 10V, V_OUT: 3V/5V,
Regulated Output, I_Q: 60µA, I_SD: 10µA, S8 Package
V_IN: 2.7V to 10V, V_OUT: 3.3V or 5V,
Regulated Output, I_Q: 60µA, I_SD: <1µA, S8 Package
90% Efficiency, V_IN: 7.4V to 40V, V_OUT(MIN): 1.24V,
I_Q: 3.2mA, I_SD: 30µA, N8,S8 Packages
75% Efficiency, V_IN: 2.7V to 5.5V, V_OUT: 1.5V/1.8V,
Regulated Output, I_Q: 180µA, I_SD: 10µA, MS8 Package
Up to 90% Efficiency, V_IN: 2.7V to 5.5V, V_OUT: 0.9V to 1.6V,
Regulated Output, I_Q: 9µA, I_SD: <1µA, MS Package
Up to 90% Efficiency, V_IN: 2.7V to 5.5V, V_OUT: 0.9V to 1.6V,
I_Q: 60µA, I_SD: <1µA, DFN Package
95% Efficiency, V_IN: 2.7V to 6V, V_OUT(MIN): 0.8V,
I_Q: 20µA, I_SD: <1µA, ThinSOT Package
95% Efficiency, V_IN: 2.5 to 5.5V, V_OUT(MIN): 0.6V,
I_Q: 20µA, I_SD: <1µA, ThinSOT Package
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN): 0.8V,
I_Q: 60µA, I_SD: <1µA, MS Package
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN): 0.8V,
I_Q: 60µA, I_SD: <1µA, TSSOP16E Package
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT: 2.5V to 5.5V,
I_Q: 25µA, I_SD: <1µA, MS Package
95% Efficiency, V_IN: 2.4V to 5.5V, V_OUT: 2.4V to 5.25V,
I_Q: 25µA, I_SD: <1µA, DFN Package
3250fa
LT/TP 1203 1K REV A • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2001