OZ960 datasheet(5/12 Pages) O2MICRO

5 / 12 page

OZ960

OZ960-DS-1.6

Page 5

FUNCTIONAL SPECIFICATIONS

Parameter

Symbol

Test Conditions

Limits

Unit

VDDA=5V; Tamb = 25

Min

Typ

Max

Reference Voltage

Nominal voltage

Vref

Iload = 0.1mA

2.37

2.5

2.63

Line regulation

VDDA = 4.7V – 5.3V

mV/V

Load regulation

Iload = 0.025 mA to 0.25 mA

mV/mA

High Frequency Oscillator

Initial accuracy

fosc

CT = 100pF, RT = 120k

(1)

KHz

Ramp peak

3.0

Ramp valley

1.0

Temp. stability

TA = 0

oC to 70oC

200

ppm/

Low Frequency Oscillator

Initial accuracy

See Table 1, page 6

Ramp peak

2.85

3.0

3.15

Ramp valley

0.94

1.0

1.06

Low Frequency PWM

Duty Cycle Range

100

Error Amplifier

Input offset voltage

Input voltage range

VDD-1.5V

Offset current at FB pin

100

Reference voltage at non-

inverting input pin (internal)

VADJ

1.19

1.25

1.31

Open loop voltage gain

Unity gain bandwidth

1.0

MHz

Power supply rejection

Threshold

Over Voltage Protection

1.90

2.15

Supply

Supply current

IOFF

ENA = low

150

200

µA

Supply current

ION

ENA = high; VDDA = 5V;

Vdim = 2V; LPWM = 50k

(2)

Ca=Cb=Cc=Cd=2nF

(3)

HF = 60kHz; LF = 185Hz

4.4

5.5

SST current

See Table 1, page 6

CTIMR current

See Table 1, page 6

NDR-PDR Output

Output resistance

Current source

Ω

Output resistance

Current sink

Ω

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