Rainbow-electronics MAX5066 Manual de usuario descargar pdf (Pagina 2)

MAX5066

Configurable, Single-/Dual-Output, Synchronous

Buck Controller for High-Current Applications

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

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 to AGND.............................................................-0.3V to +30V

BST_ to AGND........................................................-0.3V to +35V

DH_ to LX_ ....................................-0.3V to (V

BST_

- V

LX_

) + 0.3V

DL_ to PGND..............................................-0.3V to (V

+ 0.3V)

BST_ to LX_ ..............................................................-0.3V to +6V

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

AGND to PGND .....................................................-0.3V to +0.3V

REG, RT/CLKIN, CSP_, CSN_ to AGND ..................-0.3V to +6V

All Other Pins to AGND ............................-0.3V to (V

REG

+ 0.3V)

REG Continuous Output Current

(Limited by Power Dissipation, No Thermal or Short-Circuit

Protection).........................................................................67mA

REF Continuous Output Current ........................................200µA

Continuous Power Dissipation (T

= +70°C)

28-Pin TSSOP (derate 23.8mW/°C above +70°C) .....1904mW

Package Thermal Resistance (

) ...................................2°C/W

Operating Temperature Ranges

MAX5066EUI ...................................................-40°C to +85°C

MAX5066AUI .................................................-40°C to +125°C

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

Storage Temperature Range .............................-60°C to +150°C

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

ELECTRICAL CHARACTERISTICS

= V

REG

= V

= +5V, T

= T

MIN

to T

MAX

, unless otherwise noted, circuit of Figure 6. Typical values are at T

= +25°C.)

(Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

SYSTEM SPECIFICATIONS

528

Input Voltage Range V

IN and REG shorted together for +5V

operation

4.75

5.5

Quiescent Supply Current I

OSC

= 500kHz, DH_, DL_ = open 4 20 mA

STARTUP/INTERNAL REGULATOR OUTPUT (REG)

REG Undervoltage Lockout UVLO V

REG

rising 4.0

4.15

4.5 V

Hysteresis V

HYST

200

REG Output Accuracy V

= 5.8V to 28V, I

SOURCE

= 0 to 65mA

4.75 5.10 5.30

REG Dropout V

< 5.8V, I

SOURCE

= 60mA 0.5 V

INTERNAL REFERENCE

Internal Reference Voltage V

EAN_

EAN_ connected to EAOUT_ (Note 2)

0.6135

Internal Reference Voltage

Accuracy

EAN_

= V

REG

= 4.75V to 5.5V or V

= 5V to

28V, EAN_ connected to EAOUT_ (Note 2)

-0.9 +0.9

EXTERNAL REFERENCE VOLTAGE OUTPUT (REF)

Accuracy V

REF

= 100µA

3.23

3.3

3.37

Load Regulation I

REF

= 0 to 200µA 3.2 3.4 V

MOSFET DRIVERS

p-Channel Output Driver

Impedance

ON_P

1.35

4 Ω

n-Channel Output Driver

Impedance

ON_N

0.45 1.35

Ω

Output Driver Source Current

DH_

, I

DL_

2.5 A

Output Driver Sink Current

DH_

, I

DL_

Nonoverlap Time (Dead Time) t

DH_

or C

DL_

= 5nF 30 ns

1 2 3 4 5 6 7 ... 21 22

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Rainbow-electronics MAX5066 Manual de usuario Pagina 2

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