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NCV97310MW50GEVB

http://onsemi.com

4

Table 2. ABSOLUTE MAXIMUM RATINGS 

(Voltages are with respect to GND)

Rating

Value

Unit

Dc Supply Voltage (VBAT, EN, STBYB)

−0.3 to 36

V

Dc Supply Voltage (VIN2, VIN3)

−0.3 to 12

V

Dc Supply Voltage (RSTB1, RSTB2,
RSTB3, ERRB, EN2, EN3)

−0.3 to 6

V

Storage Temperature Range

−55 to 150

°

C

Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.

Table 3. ELECTRICAL CHARACTERSITICS 

(T

A

 = 25

°

C, 4.5 

 VIN 

 18 V, IOUT 

 2 A, unless otherwise specified)

Characteristic

Conditions

Typical Value

Unit

REGULATION

Output Voltage (VOUT1)

5.0

V

Output Voltage (VOUT2)

3.3

V

Output Voltage (VOUT3)

1.2

V

Line Regulation (VOUT1)

I

OUT1

 = 1.0 A

0.03

%

Line Regulation (VOUT2)

I

OUT2

 = 1.0 A

0.01

%

Line Regulation (VOUT3)

I

OUT3

 = 1.0 A

0.001

%

Load Regulation (VOUT1)

V

BAT

 = 13.2 V

0.3

%

Load Regulation (VOUT2)

V

BAT

 = 13.2 V

0.02

%

Load Regulation (VOUT3)

V

BAT

 = 13.2 V

0.03

%

SWITCHING

Switching Frequency

2.0

MHz

Soft−start Time

1.4

ms

R

OSC

 Frequency Range

50 k

W

 

 R

OSC

 

 10 k

W

2.0 to 2.6

MHz

CURRENT LIMIT

Peak Current Limit (VOUT1)

STBYB = 0 V

0.2

A

Peak Current Limit (VOUT1)

STBYB = 5 V

4.4

A

Peak Current Limit (VOUT2)

2.9

A

Peak Current Limit (VOUT3)

2.9

A

PROTECTION

Input Undervoltage Lockout (UVLO)

V

BAT

 Decreasing

3.9

V

Input Overvoltage Protection

V

BAT

 Increasing

36

V

Thermal Warning

T

J

 Rising

150

°

C

Thermal Shutdown

T

J

 Rising

170

°

C

Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.

Summary of Contents for NCV97310

Page 1: ...Iq operating mode the low voltage switchers are disabled and the standby rail is supplied by a low Iq LDO up to 150 mA with a typical Iq of 30 mA The LDO regulator is in parallel to the high voltage s...

Page 2: ...REGULATOR 2 1V2 3V3 STEP DOWN REGULATOR 3 1V2 3V3 STEP DOWN VINL VOUT VBAT SW1 EN STBYB VIN2 SW2 SW3H FB2 FB3 EN2 EN3 VDRV1 BST1 ROSC OT WARNING VIN_UVLO ERRB GND2 RSTB1 RSTB2 TEMP VIN_OV RSTB1 RSTB2...

Page 3: ...rn VOUT1 Positive 5 0 V dc output voltage LDO switcher 1 VOUT2 Positive DC output voltage switcher 2 VOUT3 Positive DC output voltage switcher 3 EN Master enable input Includes jumper J3 to connect to...

Page 4: ...2 V Line Regulation VOUT1 IOUT1 1 0 A 0 03 Line Regulation VOUT2 IOUT2 1 0 A 0 01 Line Regulation VOUT3 IOUT3 1 0 A 0 001 Load Regulation VOUT1 VBAT 13 2 V 0 3 Load Regulation VOUT2 VBAT 13 2 V 0 02...

Page 5: ...DEPTH 4 RMOD 5 RST1 6 COMP1 7 ROSC 8 ERR 9 EN2 10 RST2 11 GND1 12 RST3 13 FB3 14 EN3 15 BST3 16 GND3 17 SW3L 18 SW3H 19 VDRV2 20 VIN3 21 VIN2 22 SW2 23 GND2 24 BST2 25 FB2 27 VOUT 28 VINL 29 BST1 30 V...

Page 6: ...of EN3 state and read 0 V 4 Connect a dc enable voltage within the 2 0 V to 36 V range between STBYB and GND This will exit low Iq mode and power up switcher 1 You may use jumper J2 to connect STBYB...

Page 7: ...ices switching translates to higher efficiency Unfortunately the switching leads to a much noisier EMI profile We can greatly decrease some of the radiated emissions with some spread spectrum techniqu...

Page 8: ...using a resistor from the RDEPTH pin to GND Please see the curves below for typical values Spread spectrum is automatically turned off when there is a short to GND or an open circuit on either the RM...

Page 9: ...40 50 60 70 80 90 100 0 0 5 1 1 5 2 2 5 Efficiency Output Current A NCV97310 SW2 Efficiency 3 3 V VIN 5 0 V VIN 8 0 V Figure 8 Efficiency for SW3 with a 1 2 V Output 0 10 20 30 40 50 60 70 80 90 100 0...

Page 10: ...0 5 10 15 20 25 30 Line Regulation Input Voltage V NCV97310 SW1 3 3 V Line Regulation IOUT 100 mA IOUT 500 mA IOUT 1 0 A IOUT 2 0 A IOUT 3 0 A Figure 10 Line Regulation for SW2 with a 3 3 V Output 0...

Page 11: ...lation Input Voltage V NCV97310 SW3 1 2 V Line Regulation IOUT 100 mA IOUT 500 mA IOUT 1 0 A IOUT 2 0 A Load Regulation Figure 12 Load Regulation for SW1 with a 5 0 V Output 0 40 0 30 0 20 0 10 0 00 0...

Page 12: ...0 0 05 0 10 0 0 5 1 1 5 2 2 5 Load Regulation Output Current A NCV97310 SW2 Load Regulation 3 3 V VIN 5 0 V VIN 8 0 V Figure 14 Load Regulation for SW3 with a 1 2 V Output 0 10 0 05 0 00 0 05 0 10 0 0...

Page 13: ...ST1 6 COMP1 7 ROSC 8 ERR 9 EN2 10 RST2 11 GND1 12 RST3 13 FB3 14 EN3 15 BST3 16 GND3 17 SW3L 18 SW3H 19 VDRV2 20 VIN3 21 VIN2 22 SW2 23 GND2 24 BST2 25 FB2 27 VOUT 28 VINL 29 BST1 30 VDRV1 31 SW1 32 R...

Page 14: ...NCV97310MW50GEVB http onsemi com 14 PCB LAYOUT Figure 15 Top View Figure 16 Bottom View...

Page 15: ...06 2 2 mF 10 1206 Murata Electronics North America GCM31CR71H225KA55L Yes CIN5 1 CAP ALUM 100 mF 50 V 20 SMD 100 mF 20 FK_V_E Chemi Con EMZA500ADA101MHA0G Yes CO14 1 CAP CER 1 mF 16 V 10 X7R 0603 1 0...

Page 16: ...es Representative ON Semiconductor and the are registered trademarks of Semiconductor Components Industries LLC SCILLC or its subsidiaries in the United States and or other countries SCILLC owns the r...

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