KA4976-AL datasheet(4/20 Pages) AD

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ADuM3070

Data Sheet

Rev. 0 | Page 4 of 20

ELECTRICAL CHARACTERISTICS—5 V PRIMARY INPUT SUPPLY/3.3 V SECONDARY ISOLATED SUPPLY

4.5 V ≤ VDD1 = VDDA ≤ 5.5 V, VDD2 = VREG = VISO = 3.3 V, fSW = 500 kHz, all voltages are relative to their respective grounds, see the application

schematic in Figure 31. All minimum/maximum specifications apply over the entire recommended operating range, unless otherwise noted. All

typical specifications are at TA = 25°C, VDD1 = VDDA = 5.0 V, VDD2 = VREG = VISO = 3.3 V.

Table 3. DC-to-DC Converter Static Specifications

Parameter

Symbol

Min

Typ

Max

Unit

Test Conditions/Comments

DC-TO-DC CONVERTER SUPPLY

Isolated Output Voltage

VISO

3.0

3.3

3.63

IISO = 0 mA, VISO = VFB × (R1 + R2)/R2

Feedback Voltage Setpoint

VFB

1.15

1.25

1.37

IISO = 0 mA

Line Regulation

VISO (LINE)

mV/V

IISO = 50 mA, VDD11 = VDDA2 = 4.5 V to 5.5V

Load Regulation

VISO (LOAD)

IISO = 50 mA to 200 mA

Output Ripple

VISO (RIP)

mV p-p

20 MHz bandwidth, COUT = 0.1 µF||47 µF, IISO = 100 mA

Output Noise

VISO (NOISE)

100

mV p-p

20 MHz bandwidth, COUT = 0.1 µF||47 µF, IISO = 100 mA

Switching Frequency

fSW

1000

kHz

ROC = 50 kΩ

200

kHz

ROC = 270 kΩ

209

318

515

kHz

VOC = VDD2 (open-loop)

IDDA Quiescent

IDDA (Q)

3.5

Switch On Resistance

RON

0.5

Maximum Output Supply Current

IISO (MAX)

400

500

f ≤ 1 MHz, VISO = 3.3 V

Efficiency at Maximum Output Current

IISO = IISO (MAX), f ≤ 1 MHz

VDD1 is the power supply for the push-pull transformer.

VDDA is the power supply of Side 1 of the ADuM3070.

ELECTRICAL CHARACTERISTICS—5 V PRIMARY INPUT SUPPLY/15 V SECONDARY ISOLATED SUPPLY

4.5 V ≤ VDD1 = VDDA ≤ 5.5 V, VREG = VISO = 15 V, VDD2 = 5.0 V, fSW = 500 kHz, all voltages are relative to their respective grounds, see the

application schematic in Figure 32. All minimum/maximum specifications apply over the entire recommended operating range, unless

otherwise noted. All typical specifications are at TA = 25°C, VDD1 = VDDA = 5.0 V, VREG = VISO = 15 V, VDD2 = 5.0 V.

Table 4. DC-to-DC Converter Static Specifications

Parameter

Symbol

Min

Typ

Max

Unit

Test Conditions/Comments

DC-TO-DC CONVERTER SUPPLY

Isolated Output Voltage

VISO

13.8

15.0

16.5

IISO = 0 mA, VISO = VFB × (R1 + R2)/R2

Feedback Voltage Setpoint

VFB

1.15

1.25

1.37

IISO = 0 mA

VDD2 Linear Regulator Voltage

VDD2

4.5

5.0

5.48

VREG = 7 V to 15 V, IDD2 = 0 mA to 50 mA

Dropout Voltage

VDD2DO

0.5

1.5

IDD2 = 50 mA

Line Regulation

VISO (LINE)

mV/V

IISO = 50 mA, VDD11 = VDDA2 = 4.5 V to 5.5 V

Load Regulation

VISO (LOAD)

IISO = 20 mA to 100 mA

Output Ripple

VISO (RIP)

200

mV p-p

20 MHz bandwidth, COUT = 0.1 µF||47 µF, IISO = 100 mA

Output Noise

VISO (NOISE)

500

mV p-p

20 MHz bandwidth, COUT = 0.1 µF||47 µF, IISO = 100 mA

Switching Frequency

fSW

1000

kHz

ROC = 50 kΩ

200

kHz

ROC = 270 kΩ

192

318

515

kHz

VOC = VDD2 (open-loop)

IDDA Quiescent

IDDA (Q)

3.5

Switch On Resistance

RON

0.5

Maximum Output Supply Current

IISO (MAX)

100

140

f ≤ 1 MHz, VISO = 15.0 V

Efficiency at Maximum Output Current

IISO = IISO (MAX), f ≤ 1 MHz

VDD1 is the power supply for the push-pull transformer.

VDDA is the power supply of Side 1 of the ADuM3070.

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