Rainbow Electronics MAX5048 User Manual

General Description

The MAX5048A/MAX5048B are high-speed MOSFET drivers capable of sinking/sourcing 7.6A/1.3A peak currents. These devices take logic input signals and drive a large external MOSFET. The MAX5048A/MAX5048B have inverting and noninverting inputs that give the user greater flexibility in controlling the MOSFET. They feature two separate outputs working in complementary mode, offering flexibility in controlling both turn-on and turn-off switching speeds.

The MAX5048A/MAX5048B have internal logic circuitry, which prevents shoot-through during output state changes. The logic inputs are protected against voltage spikes up to +14V, regardless of V+ voltage. Propagation delay time is minimized and matched between the inverting and noninverting inputs. The MAX5048A/MAX5048B have very fast switching times combined with very short propagation delays (12ns typ), making them ideal for high-frequency circuits.

The MAX5048A/MAX5048B operate from a +4V to +12.6V single power supply and typically consume

0.95mA of supply current. The MAX5048A has CMOS input logic levels, while the MAX5048B has standard TTL input logic levels. These devices are available in a space-saving 6-pin SOT23 package.

Applications

Power MOSFET Switching

Switch-Mode Power Supplies

DC-DC Converters

Motor Control

Power-Supply Modules

Features

♦ Independent Source-and-Sink Outputs for

Controllable Rise and Fall Times

♦ +4V to +12.6V Single Power Supply

♦ 7.6A/1.3A Peak Sink/Source Drive Current

♦ 0.23Ω Open-Drain N-Channel Sink Output

♦ 2Ω Open-Drain P-Channel Source Output

♦ 12ns (typ) Propagation Delay

♦ Matching Delay Time Between Inverting and

Noninverting Inputs

♦ V

/2 CMOS (MAX5048A)/TTL (MAX5048B) Logic

Inputs

♦ 1.6V Input Hysteresis

♦ Up to +14V Logic Inputs (Regardless of V+

Voltage)

♦ Low Input Capacitance: 2.5pF (typ)

♦ -40°C to +125°C Operating Temperature Range

♦ 6-Pin SOT23 Package

MAX5048

7.6A, 12ns, SOT23 MOSFET Driver

________________________________________________________________ Maxim Integrated Products 1

Pin Configuration

Ordering Information

MAX5048A MAX5048B

P_OUT

N_OUT

IN-

GND

IN+

V+

Typical Operating Circuit

19-2419; Rev 0; 4/02

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART TEMP RANGE

MAX5048AAUT-

MAX5048BAUT-T-40°C to +125°C 6 SOT23-6 TTL ABED

-40°C to +125°C 6 SOT23-6

PINPACKAGE

LOGIC

INPUT

CMOS

TOP

MARK

ABEC

TOP VIEW

V+

P_OUT

16IN+

MAX5048A

MAX5048B

SOT23

5 IN-

GNDN_OUT

MAX5048

7.6A, 12ns, SOT23 MOSFET Driver

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V+ = +12V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)

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.

Voltages Referenced to GND

V+ ...........................................................................-0.3V to +13V

IN+, IN-...................................................................-0.3V to +14V

N_OUT, P_OUT ............................................-0.3V to (V+ + 0.3V)

N_OUT Continuous Output Current (Note 1) ....................390mA

P_OUT Continuous Output Current (Note 1).....................100mA

Continuous Power Dissipation (T

= +70°C)

6-Pin SOT23 (derate 8.7mW/°C above +70°C)............696mW

Operating Temperature Range .........................-40°C to +125°C

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

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

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

Note 1: Continuous output current is limited by the power dissipation of the SOT23 package.

POWER SUPPLY

V+ Operating Range V+ 4.0 12.6 V

V+ Undervoltage Lockout UVLO V+ rising 3.25 3.6 4.00 V

V+ Undervoltage Lockout Hysteresis

V+ Undervoltage Lockout to Output Delay Time

V+ Supply Current I+ IN+ = IN- = V+ 0.95 1.5 mA

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

V+ rising 300 ns

400 mV

N-CHANNEL OUTPUT

V+ = +10V, I

Driver Output Resistance— Pulling Down

Power-Off Pulldown Resistance V+ = 0 or floating, I

Power-Off Pulldown Clamp Voltage

Output Leakage Current I

Peak Output Current (Sinking) I

P-CHANNEL OUTPUT

Driver Output Resistance— Pulling Up

Output Leakage Current I

Peak Output Current (Sourcing) I

LOGIC INPUT

Logic 1 Input Voltage V

Logic 0 Input Voltage V

ON-N

LK-N

PK-N

ON-P

LK-P

PK-P

= -100mA

N-OUT

V+ = +4.5V, I

= -100mA

N-OUT

V+ = 0 or floating, I

N_OUT = V+ 6.85 20 µA

CL = 10,000pF 7.6 A

V+ = +10V,

= 50mA

P-OUT

V+ = +4.5V,

= 50mA

P-OUT

P_OUT = 0 0.001 10 µA

CL = 10,000pF 1.3 A

MAX5048A 0.67 x V+

MAX5048B 2.4

MAX5048A 0.33 x V+

MAX5048B 0.8

TA = +25°C 0.23 0.26

= +125°C 0.38 0.43

TA = +25°C 0.24 0.28

= +125°C 0.40 0.47

= -10mA 3.3 10 Ω

N-OUT

= -10mA 0.85 1.0 V

N-OUT

TA = +25°C 2.00 3.00

= +125°C 2.85 4.30

TA = +25°C 2.20 3.30

= +125°C 3.10 4.70

Ω

MAX5048

7.6A, 12ns, SOT23 MOSFET Driver

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(V+ = +12V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)

Note 2: All DC specifications are 100% tested at TA= +25°C. Specifications over -40°C to +125°C are guaranteed by design. Note 3: Guaranteed by design, not production tested.

Logic Input Hysteresis V

Logic Input Current V

Input Capacitance C

SWITCHING CHARACTERISTICS FOR V+ = +10V

Rise Time t

Fall Time t

Turn-On Propagation Delay Time t

Turn-Off Propagation Delay Time t

Break-Before-Make Time 2.5 ns

SWITCHING CHARACTERISTICS FOR V+ = +4.5V

Fall Time t

Turn-On Propagation Delay Time t

Turn-Off Propagation Delay Time t

Break-Before-Make Time 4.2 ns

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

HYS

D-ON

D-OFF

D-ON

D-OFF

MAX5048A 1.6

MAX5048B 0.68

= V+ or 0 0.001 10 µA

IN_

CL = 1000pF 8

CL = 5000pF 45

CL = 10,000pF 82

CL = 1000pF 3.2

CL = 5000pF 7.5

CL = 10,000pF 12.5

Figure 1, CL = 1000pF (Note 3) 7 12 25 ns

CL = 1000pF 12

CL = 5000pF 41Rise Time t

CL = 10,000pF 74

CL = 1000pF 3.0

CL = 5000pF 7.0

CL = 10,000pF 11.3

Figure 1, CL = 1000pF (Note 3) 8 14 27 ns

2.5 pF

+ 6 hidden pages