Rainbow-electronics MAX8514 Manual de usuario descargar pdf (Pagina 6)

MAX8513/MAX8514

Wide-Input, High-Frequency, Triple-Output Supplies

with Voltage Monitor and Power-On Reset

6 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

= V

SUP2

= 12V, V

PVL

= V

BST

- V

= V

DRV3P

= 5V, V

SUP3N

= 3.3V, V

DRV3N

= -5V, C

= 4.7µF, C

REF

= 0.22µF, R

FREQ

15.0kΩ, T

= -40°C to +125°C (Note 2), unless otherwise noted.)

PARAMETER SYMBOL CONDITIONS MIN MAX UNITS

OUT1 (BUCK CONVERTER)

Output Voltage Range V

OUT1

(Note 1) 1.25 5.50 V

FB1 Regulation Threshold V

FB1

1.225 1.265 V

Error-Amplifier Open-Loop

Voltage Gain

VOL

65 dB

FB1 Input Bias Current I

FB1_BIAS

FB1

= 1.3V -200 +200 nA

DH Output-Resistance High R

DH_HIGH

2.55 Ω

DH Output-Resistance Low R

DH_LOW

2.1 Ω

DL Output-Resistance High R

DL_HIGH

5 Ω

DL Output-Resistance Low R

DL_LOW

1.3 Ω

ILIM

= 2.00V, V

CSN

= 0 to 5.5V 243 303

ILIM

= 0.50V, V

CSN

= 0 to 5.5V 49 83

Current-Limit Threshold

(Positive)

ILIM

= V

, V

CSN

= 0 to 5.5V 147 190

ILIM

= 2.00V, V

CSN

= 0 to 5.5V -333 -199

ILIM

= 0.50V, V

CSN

= 0 to 5.5V -90 -42

Current-Limit Threshold

(Negative)

ILIM

= V

, V

CSN

= 0 to 5.5V -210 -122

CSP and CSN Bias Current V

CSP

= V

CSN

= 0 to 5.5V -120 +135 µA

ILIM Bias Current V

ILIM

= 1.25V -5.7 -4.3 µA

SS Soft-Start Charge Current V

= 0.6V 15 35 µA

Soft-Start Discharge Resistance 200 Ω

LX, BST, PVL Leakage Current

= V

= 28V, V

BST

= 33V, V

PVL

= 5V,

SYNC/EN

= 0

20 µA

FB1 Power-On Reset Threshold 1.08 1.20 V

OUT2 (POSITIVE LDO)

SUP2 Operating Range V

SUP2

(Note 1) 4.5 28.0 V

DRV2 Clamp Voltage V

DRV2

FB2

= 0.75V 7.75 9.00 V

SUP2 Supply Current 300 µA

SUP2 Shutdown Supply Current V

SYNC/EN

= 0 10 µA

FB2 Regulation Voltage V

FB2

0.775 0.816 V

FB2 Input Bias Current I

FB2_BIAS

FB2

= 0.75V 150 nA

DRV2 Output Current Limit V

= 5V, V

DRV2

= 5V, V

FB2

= 0.77V 12 mA

DRV2 Output Current Limit

During Soft-Start

= 6V, V

DRV2

= 5V, V

FB2

= 0.70V 8 12 mA

FB2 Power-On Reset Threshold 0.690 0.742 V

FB2 to DRV2 Transconductance G

DRV2

= +250µA, -250µA 0.11 0.41 S

1 2 3 4 5 6 7 8 9 10 11 ... 34 35

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Rainbow-electronics MAX8514 Manual de usuario Pagina 6

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