33702 데이터 시트보기 (PDF) - Motorola => Freescale

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33702

3.0 A Switch-Mode Power Supply with Linear Regulator

Motorola => Freescale 

Freescale Semiconductor, Inc.

STATIC ELECTRICAL CHARACTERISTICS

Characteristics noted under conditions -40°C ≤ TJ ≤ 125°C unless otherwise noted. Input voltages VIN1 = VIN2 = 3.3 V using the typical

application circuit (see Figure 20) unless otherwise noted.

Characteristic

Symbol

Min

Typ

Max

Unit

GENERAL

Operating Voltage Range (VIN1, VIN2)

VIN

2.8

–

6.0

V

Start-Up Voltage Threshold (Boost Switching)

VST

–

1.6

1.8

V

VBST Undervoltage Lockout

VBST_UVLO

–

6.0

–

V

Input DC Supply Current (Normal Operation Mode, Enabled)

IIN

–

60

–

mA

VIN1 Pin Input Supply Current (EN1 = EN2 = 0)

IIN1

–

9.0

–

mA

VIN2 Pin Input Leakage Current (EN1 = EN2 = 0)

IIN2

–

TBD

–

µA

VDDI Internal Supply Voltage

VDDI

3.0

–

3.3

V

VDDI Maximum Output Current

IDDI

–

TBD

–

µA

BUCK CONVERTER

Buck Converter Output Voltage Range

IVOUT = 30 mA to 3.0 A, VIN1 = VIN2 = 2.8 V to 6.0 V

VOUT

V

0.8

–

5.0

Buck Converter Feedback Voltage

IVOUT = 30 mA to 3.0 A, VIN1 = VIN2 = 2.8 V to 6.0 V. No RB Resistor.

Includes Load Regulation Error

VINV

V

0.784

0.8

0.816

Buck Converter Voltage Margining Step

VMVO

–

1.0

–

%

Buck Converter Line Regulation

VIN1 = VIN2 = 2.8 V to 6.0 V, IVOUT = 3.0 A

REGLNVO

-1.0

–

%

1.0

Buck Converter Load Regulation

IVOUT = 30 mA to 3.0 A

REGLDVO

-1.0

–

%

1.0

VOUT Input Leakage Current

VOUT = 5.0 V

IVOUTLK

µA

–

TBD

–

High-Side Power MOSFET Q1 RDS(ON)

ID = 1.0 A, TA = 25°C, VBST = 8.0 V

RDS(ON)

–

mΩ

–

50

Low-Side Power MOSFET Q2 RDS(ON)

ID = 1.0 A, TA = 25°C, VBST = 8.0 V

RDS(ON)

–

mΩ

–

50

Buck Converter Peak Current Limit (High Level)

IH_LIM

3.4

4.5

6.0

A

Buck Converter Valley Current Limit (Low Level)

IL_LIM

1.7

2.25

3.0

A

VOUT Pull-Down MOSFET Q3 Current Limit

TA = 25°C, VBST = 8.0 V

IQ3_LIM

A

–

2.0

–

VOUT Pull-Down MOSFET Q3 RDS(ON)

ID = 1.0 A, TA = 25°C, VBST = 8.0 V

RDS(ON)

–

Ω

–

1.0

Thermal Shutdown (Switcher, VOUT FET)

TSD

150

170

190

°C

Thermal Shutdown Hysteresis

TSDHys

–

15

–

°C

33702

6

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