MAX1870A Просмотр технического описания (PDF) - Maxim Integrated

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производитель

MAX1870A

Step-Up / Step-Down Li+ Battery Charger

Maxim Integrated 

Step-Up/Step-Down

Li+ Battery Charger

Typical Operating Characteristics (continued)

(Circuit of Figure 1, VDCIN = 16V, CELLS = REFIN, VCLS =VREF, VICTL = VREFIN = 3.3V, TA = +25°C, unless otherwise noted.)

4.11

4.10

4.09

4.08

4.07

4.06

4.05

4.04

4.03

0

REF LOAD REGULATION

500 1000 1500 2000 2500

LOAD CURRENT (µA)

REFERENCE ERROR vs. TEMPERATURE

0.45

0.40

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0

-40 -20

0 20 40 60

TEMPERATURE (°C)

80 100

5.38

5.36

5.34

5.32

5.30

5.28

5.26

5.24

0

LDO LOAD REGULATION

VIN = 28V

VIN = 16V

VIN = 9V

10

20

30

40

50

LOAD (mA)

LDO vs. TEMPERATURE

0.8

0.6

0.4

0.2

0

-0.2

-0.4

-40 -20

0 20 40 60

TEMPERATURE (°C)

80 100

OUTPUT VOLTAGE RIPPLE

vs. BATTERY VOLTAGE

180

160

140

120

100

80

60

40

20

0

0

5

10

15

20

VBATT (V)

STEP-UP/STEP-DOWN

SWITCHING WAVEFORM

VIN = 16V

VBATT = 16V

2.00µs

20V

10V

D4 CATHODE

0V

10V

D3 ANODE

0V

4A

INDUCTOR CURRENT

2A

VBATT

(AC-COUPLED)

200mV/div

STEP-DOWN

SWITCHING WAVEFORM

VIN = 16V

VBATT = 12V

2.00µs

20V

10V

D4 CATHODE

0V

10V

D3 ANODE

0V

4A

INDUCTOR CURRENT

2A

VBATT

(AC-COUPLED)

10mV/div

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