Rainbow-electronics MAX8514 Bedienungsanleitung PDF herunterladen (Seite 2)

MAX8513/MAX8514

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

with Voltage Monitor and Power-On Reset

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

= 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

= 0°C to +85°C, unless otherwise noted. Typical values are at T

= +25°C.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

IN, DRV3P, SUP2 to GND.......................................-0.3V to +30V

DRV2 to GND ..........................................-0.3V to (V

SUP2

+ 0.3V)

DRV3N to GND......................(V

SUP3N

- 28V) to (V

SUP3N

+ 0.3V)

FREQ, PFI, PFO, POR, SUP3N, SYNC/EN,

CSP, CSN to GND ................................................-0.3V to +6V

VL to GND ...................-0.3V to the lesser of (V

+ 0.3V) or +6V

COMP1, FB1, FB2, FB3P, FB3N, REF, ILIM,

SS, SEQ to GND......................................-0.3V to (V

+ 0.3V)

PVL to PGND............................................................-0.3V to +6V

DL to PGND...............................................-0.3V to (V

PVL

+ 0.3V)

BST to LX..................................................................-0.3V to +6V

DH to LX....................................................-0.3V to (V

BST

+ 0.3V)

PGND to GND .......................................................-0.3V to +0.3V

VL Short Circuit to GND .............................................Continuous

Continuous Power Dissipation (T

= +70°C)

28-Pin QSOP (derate 10.8mW/°C above +70°C).........860mW

Operating Temperature Range

MAX8513EEI, MAX8514EEI.............................-40°C to +85°C

MAX8514AEI..................................................-40°C to +125°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

GENERAL

5.5 28.0

IN Operating Range

IN = VL 4.5 5.5

IN Supply Current

FB1

= 1.3V, V

FB2

= V

FB3

= 1.0V, does not

include switching current to PVL and BST,

SYNC/EN = VL

2.6 3.2 mA

IN Shutdown Current V

SYNC/EN

= 0, R

FREQ

= 50kΩ 200 300 µA

VL REGULATOR

VL Output Voltage V

= 6V to 28V, I

= 0.1mA to 40mA 4.75 5 5.25 V

VL Dropout Voltage From IN to VL, V

= 5V, I

= 40mA 560 mV

VL Line Regulation V

= 6V to 28V, I

= 5mA 0.05 %

VL Undervoltage Threshold VL rising, V

HYST

= 675mV (typ) 3.6 4.2 V

OUT1 (BUCK CONVERTER)

Output Voltage Range V

OUT1

(Note 1) 1.25 5.50 V

FB1 Regulation Threshold V

FB1

1.234 1.25 1.259 V

Error-Amplifier Open-Loop

Voltage Gain

VOL

65 90 dB

FB1 Input Bias Current I

FB1_BIAS

FB1

= 1.3V -200 +10 +200 nA

Error-Amplifier Gain Bandwidth 25 MHz

DH Output-Resistance High R

DH_HIGH

1.5 2.55 Ω

DH Output-Resistance Low R

DH_LOW

1.2 2.1 Ω

DL Output-Resistance High R

DL_HIGH

2.5 5 Ω

DL Output-Resistance Low R

DL_LOW

0.7 1.3 Ω

Driver Dead Time t

Starts from V

= 1V or (V

- V

) = 1V 50 ns

1 2 3 4 5 6 7 ... 34 35

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