LT1073_15 Datasheet, PDF (11/16 Pages) Linear Technology – Micropower DC/DC Converter Adjustable and Fixed 5V, 12V

LT1073
APPLICATIO S I FOR ATIO
V_BAT
212mV
R1 _REF
SET
R2
V_IN
–
+
LT1073
A0
5V
100k
TO
PROCESSOR
GND
( ) R1 = R2
V_LB
212mV
–1
VLB = BATTERY TRIP POINT
1073 F12
Figure 12. Settling Low Battery Detector Trip Point
Table 2. Inductor Manufacturers
MANUFACTURER
Gowanda Electronics Corporation
1 Industrial Place
Gowanda, NY 14070
716-532-2234
Caddell-Burns
258 East Second Street
Mineola, NY 11501
516-746-2310
Coiltronics International
984 S.W. 13th Court
Pompano Beach, FL 33069
305-781-8900
Toko America Incorporated
1250 Feehanville Drive
Mount Prospect, IL 60056
312-297-0070
Renco Electronics Incorporated
60 Jefryn Boulevard, East
Deer Park, NY 11729
800-645-5828
PART NUMBERS
GA10 Series
GA40 Series
7300 Series
6860 Series
Custom Toroids
Surface Mount
Type 8RBS
RL1283
RL1284
L1
R3
680k
V_BAT
I_LIM
V_IN
AO
SW1
LT1073
FB
SET
GND SW2
D1
V_OUT
R2
+
C1
R1
( )( ) ^VOUT ⁼
R2
R1
+
1
212mV
1073 F13
Figure 13. Output Ripple Reduction Using Gain Block
Table 3. Capacitor Manufacturers
MANUFACTURER
Sanyo Video Components
1201 Sanyo Avenue
San Diego, CA 92073
619-661-6322
Nichicon America Corporation
927 East State Parkway
Schaumberg, IL 60173
708-843-7500
Sprague Electric Company
Lower Main Street
Stanford, ME 04073
207-324-4140
PART NUMBERS
OS-CON Series
PL Series
150D Solid Tantalums
550D Tantalex
TYPICAL APPLICATIO S
1.5V to 3V Step-Up Converter
L1^†
120µH ^1N5818
220Ω
3V OUTPUT
20mA AT
V_BATTERY = 1V
I_LIM
V_IN
1.5V
CELL
SW1
LT1073
FB
GND SW2
536k*
+
100µF
40.2k*
* 1% METAL FILM
† _{L1 = GOWANDA GA10-123k}
OR CADDELL-BURNS 7300-14
1073 TA03
1.5V to 9V Step-Up Converter
L1^†
120µH ^1N5818
9V OUTPUT
7mA AT V_BATTERY = 1V
16mA AT V_BATTERY = 1.5V
1.5V
CELL
I_LIM
V_IN
SW1
LT1073
FB
GND SW2
1M*
+
47µF
24.3k*
* 1% METAL FILM
† _{L1 = GOWANDA GA10-123k}
OR CADDELL-BURNS 7300-14
1073 TA04
11