44mH
~
48V DC
~
44mH
*L1 = CTX110077
IQ = 120µA
+
+
–
47µF
100V
3.6MΩ
10kΩ
VN2222L
L1*
500µH
10nF 15V
12V
100Ω
1N4148
1
2
1N965B
+ 10µF
16V
ILIM VIN SW1 3
ADP1173
GND SW2 FB 8
5
4
ADP1173
MUR110
+ 220µF
10V
+5V
100mA
390kΩ
2N5400
IRF530
110kΩ
Figure 29. Telecom Supply
4 x NICAD
OR
ALKALINE
CELLS
+
470µF
L1*
100µH
56Ω
1
2
ILIM VIN SW1 3
7 SET
ADP1173 AO 6
GND SW2 FB 8
5
4
1N5818
470kΩ
+
470µF
SI9405DY
75k
+
240Ω
VOUT = 5V AT 100mA
AT VIN = 2.6V
470µF
24kΩ
*L1 = GOWANDA GA20-103K
COILTRONICS CTX100-4
VIN = 2.6V TO 7.2V
Figure 30. 5 V to 5 V Step-Up or Step-Down Converter
L1*
20µH, 5A
1N5820
+
470µF
2 x NICAD
47kΩ
100kΩ
2N3906
2.2MΩ
100kΩ
100kΩ
1
6 AO ILIM
2
VIN
SW1 3
220Ω
100Ω
2N4403
ADP1173
7 SET
GND
5
FB 8
SW2
4
301kن
5Ω
100kن
47Ω
+
MJE200
+5V OUTPUT
200mA
LOCKOUT AT
1.85V INPUT
470µF
*L1 = COILTRONICS CTX-20-5-52
†1% METAL FILM
Figure 31. 2 V to 5 V at 200 mA Step-Up Converter with Undervoltage Lockout
REV. 0
–13–