PROGRAMMABLE SYNCHRONOUS DC/DC

CONVERTER, DUAL LOW DROPOUT

REGULATOR CONTROLLER

© 1999 SEMTECH CORP.

October 25, 1999

652 MITCHELL ROAD NEWBURY PARK CA 91320

SC1164/5

2

Parameter

Symbol

Maximum

Units

VCC to GND

VCC

-0.3 to +7

V

PGND to GND

± 1

V

BST to GND

-0.3 to +15

V

Operating Temperature Range

T

A

0 to +70

°C

Junction Temperature Range

T

J

0 to +125

°C

Storage Temperature Range

T

STG

-65 to +150

°C

Lead Temperature (Soldering) 10 seconds

T

L

300

°C

Thermal Impedance Junction to Ambient

θ

JA

80

°C/W

Thermal Impedance Junction to Case

θ

JC

25

°C/W

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

Unless specified: VCC = 4.75V to 5.25V; GND = PGND = 0V; VOSENSE = V

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Switching Section

Output Voltage

I

See Note 1.

Supply Voltage

VCC

4.5

7

V

Supply Current

VCC = 5.0V

8

15

mA

Load Regulation

I

1

%

Line Regulation

0.5

%

Current Limit Voltage

55

70

85

mV

Oscillator Frequency

175

200

225

kHz

Oscillator Max Duty Cycle

90

95

%

Peak DH Sink/Source Current

BSTH-DH = 4.5V, DH-PGNDH = 3V

1

A

Peak DL Sink/Source Current

BSTL-DL = 4.5V, DL-PGNDL = 3V

1

A

Output Voltage Tempco

65

ppm/

Gain (A

VOSENSE to V

O

35

dB

OVP threshold voltage

120

%

OVP source current

V

10

mA

Power good threshold voltage

85

115

%

Dead time

50

100

ns

Linear Sections

Quiescent current

LDOV = 12V

5

mA

Output Voltage (LDO1 SC1164)

2.475 2.500 2.525

V

Output Voltage (LDO2 SC1164)

1.485 1.500 1.515

V

Reference Voltage (SC1165)

1.252 1.265 1.278

V

Feedback Pin Bias Current (SC1165)

10

uA

Gain (A

LDOS (1,2) to GATE (1,2)

90

dB

Load Regulation

I

(2)

0.3

%

Line Regulation

0.3

%

Output Impedance

1

K

Ω

Notes: (1) See Output Voltage table.

(2) In application circuit.