SP6642EU Просмотр технического описания (PDF) - Signal Processing Technologies

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SP6642EU

Single Alkaline Cell, High Efficiency Step-Up DC-DC Converter

Signal Processing Technologies 

PERFORMANCE CHARACTERISTICS (continued)

Refer

to

the

circuit

in

Figure

25

with

V

BATT

=

1.2V,

R1

+

R2

=

1MΩ,

and

T

AMB

=

+25OC

unless

otherwise

noted.

22

20

18

16

14

12

10

8

6

Vout = 2.4V

Vout = 3.3V

4

Vout = 5V

2

0

0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6

Input Voltage (V)

10msec/div

Figure 13. Maximum Output Current vs. Input Voltage

where L1=150µH, TDK NLC565050T-151K

Figure 14. Switching Waveforms:

VOUT=3.3V, VIN=1.2V, IOUT=12mA where

1: LX, 2V/div, L1=TDK NKLC565050T-151K

2: VOUT, 20mV/div, 3.3V DC offset

3: Inductor Current, 100mA/div

500µsec/div

500µsec/div

Figure 15. Load-Transient Response:

VOUT=3.3V, VBATT=1.2V where

1: VOUT, 20mV/div, 3.3V DC offset

2: LOAD, 2mA to 20mA, 10mA/div

Figure 16. Line-Transient Response:

VOUT=3.3V, LOAD=15mA where

1: VOUT, 50mV/div, 3.3V DC offset

2: VBATT, 1V to 5V, 500mV/div

Rev. 10-6-00

SP6642/6643 High Efficiency Step-Up DC-DC Converter

7

© Copyright 2000 Sipex Corporation

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