MAS9251ACAF-T 查看數據表（PDF） - Micro Analog Systems Oy

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MAS9251ACAF-T

Regulated Charge Pump DC/DC Converter

Micro Analog Systems Oy 

DA9251.001

25 October, 2001

N 7KHUPDO 3URWHFWLRQ

3DUDPHWHU

6\PERO

&RQGLWLRQV

Threshold High

TH

Threshold Low

TL

The hysteresis of 10 oC prevents the device from turning on too soon after thermal shut-down.

0LQ 7\S 0D[

145 160 175

135 150 165

8QLW

°C

°C

N 6KXWGRZQ 7HUPLQDO 6SHFLILFDWLRQV

3DUDPHWHU

6\PERO

&RQGLWLRQV

0LQ

Shutdown Voltage

OFF State

VCTRL

−0.3

ON State

1.6

Shutdown Control Input Pin

ICTRL

VCTRL = VIN

Current

VCTRL = 0 V

If CTRL-pin is not connected, MAS9251 is in OFF state (900 kΩ pull-down resistor to ground).

N 3RZHU 'LVVLSDWLRQ

7\S

0D[

0.55

VIN + 0.3

4

10

0

8QLW

V

µA

3DUDPHWHU

Thermal Resistance MSOP-8

(Junction-to-Air)

Maximum Power Dissipation

6\PERO

RJA

Pd

&RQGLWLRQV

typical PC board mounting

any ambient temperature

0LQ 7\S 0D[

206.3

PdMAX

=

TJMAX − TA

R JA

Note 1

8QLW

°C/W

W

Efficiency

η

VIN = 3 V, IOUT = 50 mA

80

%

I‚‡rà : TJ(MAX) denotes maximum operating junction temperature (+125°C), TA ambient temperature, and RJA junction-to-air thermal

resistance (206.3°C/W).

N '\QDPLF 3DUDPHWHUV

3DUDPHWHU

Start-up Time (from control

signal edge to 90% of VNOM)

Switching Frequency

6\PERO

tstart-up

FOSC

&RQGLWLRQV

VCTRL = 0 to VIN, VIN = 3 V,

IOUT ≤ 100 mA

0LQ 7\S 0D[

1

0.6

1

1.8

8QLW

ms

MHz

5 (11)

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