LTC3424_15 Datasheet, PDF (12/12 Pages) Linear Technology – Low Output Voltage, 3MHz Micropower Synchronous Boost Converters

LTC3423/LTC3424
TYPICAL APPLICATIO
Triple Output Converter
D2 D3
D4 D5
0.1µF
0.1µF
0.1µF
3.6V
2mA
4.7µF
V_DD
IN
C1
2.2µF
V_DD = 2.7V TO 5.5V
V_IN = 0.9V TO 1.5V
L1
2.2µH
+
1
– CELL
C2
10µF
LTC3423
6
4
V_DD
SW
10
SHDN
7
V_OUT
3
V_IN
8
FB
2
9
MODE/SYNC V_C
1
R_t
5
GND
R_t
30.1k
f_OSC
=
1MHz
D1
C4
470pF
RC
82k
R1
110k
R2
C5 ^249k
4.7pF
0.1µF
V_OUT
1.8V
700mA
C3
44µF
(2× 22µF)
0 = FIXED FREQ
1 = Burst Mode OPERATION
C1: TAIYO YUDEN JMK212BJ225MG
C2: TAIYO YUDEN JMK212BJ106MM
C3: TAIYO YUDEN JMK325BJ226MM
D1: ON SEMICONDUCTOR MBRM120T3
D2 TO D7: ZETEX FMND7000 DUAL DIODE
L1: SUMIDA CD43-2R2M
3423/24 TA05
D6
4.7µF
D7
–1.1V
1mA
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Single Cell, High Current (1A) Micropower, Synchronous
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Single Cell, High Current (2A) Micropower, Synchronous
3MHz Step-Up DC/DC Converter
ThinSOT is a trademark of Linear Technology Corporation.
12 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^q FAX: [phone] ^q www.linear.com
COMMENTS
Internal 2A Switches, V_IN As Low As 1.8V
5V at 1A from Single Li-Ion Cell
V_IN As Low As 1.5V, I_Q = 100µA
3V at 30mA from 1V, 5V at 200mA from 3.3V
V_IN As Low As 1.1V, 3V at 30mA from Single Cell
I_Q = 20µA, 1µA Shutdown Current, V_IN As Low As 1V
1.1A, 0.5Ω/30V Internal Switch, V_IN As Low As 1.8V
92% Efficiency, 0.85V ≤ V_IN, 2.6V ≤ V_OUT ≤ 5V
V_IN = 0.5V to 5.5V, Up to 97% Efficiency Synchronizable
Oscillator from 100kHz to 3MHz
V_IN = 0.5V to 5.5V, Up to 97% Efficiency Synchronizable
Oscillator from 100kHz to 3MHz
34234f
LT/TP 0302 2K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2001