AS1334 Просмотр технического описания (PDF) - austriamicrosystems AG

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AS1334

650mA, Ultra low Ripple Step Down DC/DC Converter

austriamicrosystems AG 

AS1334

Datasheet - Typical Operating Characteristics

Figure 7. Output Voltage vs. Temperature

3.06

Figure 8. Efficiency vs. Output Current

100

3.04

95

3.02

90

3

lid 2.98

2.96

a 2.94

v -40

Iout=50mA

Iout=300mA

Iout=650mA

-15

10

35

60

85

Temperature (°C)

85

80

75

70

0

Vi n=3.25V

Vi n=3.6V

Vi n=3.9V

Vi n=4.2V

Vi n=4.5V

Vi n=5.5V

100 200 300 400 500 600 700

Output Current (mA)

till Figure 9. Switch Peak Current Limit vs. Temperature; closed loop

1.2

Figure 10. Load Transient Response; VOUT = 3.0V, VIN = 4.2V

AG t s 1.15

s n 1.1

m te 1.05

a on 1

c -40

Vi n=2.7V

Vi n=3.6V

Vi n=5.5V

-15

10

35

60

85

Temperature (°C)

10µs/Div

al Figure 11. Startup; VIN = 3.6V, VOUT = 3.0V, IOUT<1mA,

Technic RLOAD=3.3kΩ

Figure 12. Startup; VIN = 4.2V, VOUT = 3.0V, IOUT<1mA,

RLOAD=3.3kΩ

50µs/Div

www.austriamicrosystems.com/DC-DC_Step-Down/AS1334

Revision 1.09

50µs/Div

7 - 18

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