[AP3440]

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1.

AP3440 PWM DC-DC40 125

4.1V 5.5V 1.822V MOSFET 4.5A

AP3440 28-pin QFN0505

2.

4.1V 5.5V1.822V ( 1.81%, 1.87%)

4.5A: 2100 kHz

1800kHz 2250kHzMOSFET

, , ,Ta=-40 125

28 QFN0505 Exposed Pad

4.5A MOSFET DC-DCAP3440ABN182

Figure 1. Application

Vin

Vout

C1

SGND

SW1

SW2

FSIN

SW3

CC

SW4

SW5

AP3440

ENEN

SW6

VO1

PG

SS

NCVO2

C5

R1

C2

L1

C3

C4

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3.

1. ............................................................................... 1

2. ............................................................................... 1

3. ............................................................................... 2

4. ........................................................................... 3

5. ................................................................... 3

6. ................................................................... 4

.......................................................................... 4 .......................................................................... 4

7. ......................................................................... 5

8. ......................................................................... 6

9. ........................................................................... 7

10. ................................................................... 8

11. ............................................................................. 9

11.1 ........................................................................ 9 11.2 .................................................................... 9 11.3 ................................................................ 9 11.4 ................................................................ 9 11.5 (OVP:Over Voltage Protection) ............................... 10 11.6 (UVLO:Under Voltage Lock Out) ............................... 10

11.7 (OCL:Over Current Limit) .................................... 10 11.8 (TSD:Thermal Shut Down) ........................................... 11 11.9 ......................................................... 11

12. .............................................................................. 12

13. ...................................................................... 13

14. ........................................................................ 14

VIN ................................................................ 14 GND .......................................................................... 14 ........................................................... 14

......................................................... 14

15. .......................................................................... 15

.............................................. 15 ....................................................................... 15

16. ............................................................................ 16

.......................................................................... 17

[AP3440]

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4.

Figure 2. Block Diagram

5.

AP3440ABN182 1.822V -40 125 28-pin QFN(0505) SFS

CC

ERRamp

BGR

Vcnt.

PWMcomp

OSC

iRAMP

OCLcomp

FSO

FSIN

-

+

CSamp

-

+

-

+

SGND

PGND

-

+

A

ResetOVPcomp

-

+

PVIN

SW

VO VIN

SS

EN

-

+

VREF

PWGDcomp

-

+ PWGDH

-

+

PG

TEST1

TEST2

TEST3

Reset

Reset

Set

PWGDL

Timer

SS

VREF

EN

EN

FB

VREF

FB

VS+

VS+

PVIN

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Figure 3. Pin Configurations

No Pin I/O Description

1 FSIN ISGND PGND

2 EN IH

3 SGND

4 SS I/OSS SGND

5 CC OSS CC

6 VO1 I7 VO2 I8 TEST1 I

PGND SGND9 TEST2 I10 TEST3 I11 PGND112 PGND213 PGND314 PGND415 NC16 SW1 O

MOSFET

17 SW2 O18 SW3 O19 SW4 O20 SW5 O21 SW6 O22 PVIN1 I23 PVIN2 I24 PVIN3 I25 PVIN4 I26 VIN I

27 PG ON-chMOSFET

28 FSO O

Exposed Pad Corner Pad

SGND

SW1

SW2

FSIN

SW3

CC

SW4

SW5

AP3440

EN

SW6

VO1

SS

NCVO2

Corner Pad

Exposed Pad

[AP3440]

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Min Max VIN, PVIN1 4, SW1 6

- PGND1 4 Vterm1 -0.3 +6.0 V

FSIN,EN,SS,CC,TEST1 3,PG,FSO,VO1,VO2 - SGND Vterm2 -0.3 +6.0 V

PGND1 4 - SGND Vterm3 -0.3 +0.3 VVIN - PVIN1 4 Vterm4 -0.3 +0.3 V

Tstg -40 150 C Tj -40 150 C

(Note 1) Ta=25 Pd parallel 11.767 WNote 1.Junction to Ambient Thermal Resistance JA 39.7 /W

Junction to Case Thermal Resistance JC 0.93 /WParallel JA JC:75%) (JA+JC) 10.63 /WAmbient temperature of 25ºC using JEDEC 4L board. (114.3mm×76.2mm)

Figure 4. Power Dissipation

0

2

4

6

8

10

12

14

-50 -25 0 25 50 75 100 125 150

OPERATING AMBIENT TEMPERATURE Ta

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Parameter Symbol min typ max UnitVin 4.1 - 5.5 VTa -40 - 125

PG MOSFET IMOSON - - 50 mAFSYN 1800 2100 2250 kHz

L TFSYNL 100 - 384 nsIDC - - 3.0 A

25ms 10%90% 3A10% 4.5A

IPEAK - - 4.5 A

Figure 5. Iout Profile

[AP3440]

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( VIN=5.05V Tj=-40 150 ) Parameter Symbol Min Typ Max Unit Condition

(Note 5) Vout 1.788 1.822 1.855 VVIN Isupply - - 3 mA

VIN Ishd1 - - 1 uA Tj=25 PVIN Ishd2 - - 1 uA Tj=25

OCL 5.5 7.85 10.2 AOVP 126 134 142 % VoutFreq 1950 2100 2250 kHzIss 24 30 36 uAVss 1.11 1.17 1.23 VTss 2.1 3.9 6.7 ms Css=0.1uF

SWUMINon - - 85 nsSWLMINon - - 132 ns

MOSFET

RDSONH - 91 139 Cu

MOSFET

RDSONL - 41 69 Cu

VD 3.8 3.95 4.1 V H (Note 5) PWGDH 1.873 1.905 1.936 VL (Note 5) PWGDL 1.734 1.763 1.792 V

PG_BAD TRESET1 1 - 4.7 usPG_GOOD TRESET2 8 10 12 msPG MOSFET RMOSON - - 50 =20mAEN REN 60 100 140 kEN ”H” (Note 2) VSHDNH 2.0 - 5.5 VEN ”L” (Note 2) VSHDNL 0 - 0.4 VEN

MOSFETRMOSON - - 200 10mA

(Note 3) - - 0.685 %/V Vin=4.7 5.4V(Note 3) - - 0.3 % Io=0.1 3.5A

(Note 3)Io=2 3.5ASlew rate= 0.2A/usVtranO - - 35.3 mV

VtranU - - 33.0 mV(Note 2,Note 4) Ttsd 155 175 200 °C

(Note 2,Note 4) TSDhys 1 25 50 °C

FSIN RFSIN 350 500 650 kFSIN ”H”(Note 2) VSHDNH 2.0 5.5 VFSIN ”L”(Note 2) VSHDNL 0 0.4 V

Note 2.Note 3.Note 4. IC

Note 5.

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Figure 6. Timing Chart

VIN 4.1V EN HAP3440

SS 0.6V OCL(7.85Atyp)×1/2 OCL(7.85Atyp)SS 0.6V OCL(7.85Atyp)×SS 1.2V

SS Vout 1.2V OVP(Vout×134%typ)

Vout 10ms PGNch-MOSFET PG_MOS Vout 2usPG_MOS Vout 10ms PG_MOS

Vout Discharge

VIN

EN

3V

SS

OCL

OVP

OCL×100%

Vout×134%

VO1,VO2

PG

10ms

+4.67%

-4.41%

2us

0%OCL×50%

0%

Vout×100%

3V

10ms

2us

10ms

threshold

threshold

signal

[AP3440]

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11.1

AP3440 PWM1.822Vtyp. VO1,2

ICP-ch MOSFET P-ch

MOSFET N-ch MOSFET

11.2

AP3440 FSIN H L1800kHz 2250kHz L 100ns 384ns

FSIN SGND PGNDFSIN H H L

Figure 7. External Synchronous Timing Chart

11.3

AP3440 FSO

11.4

AP3440 PG PG N-chMOSFETPG_MOS VIN

PWGDH PWGDL 10ms PG_MOSPWGDH PWGDL 2us PG_MOS

PG_MOS PWGDH PWGDL 9.

FSIN

FSO

PchMOSFETOn On On On On

0.5T

FSIN H

FSIN H L

FSIN H L

H L

On

0.5T

T=1/Freq

[AP3440]

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11.5 (OVP:Over Voltage Protection)

Vout

Protections About on Product FunctionCondition ActionOVP(Over Voltage Protection) Vout 134%(typ)

P-ch MOSFETN-ch MOSFET

11.6 (UVLO:Under Voltage Lock Out)

AP3440

Protections About on Product FunctionCondition Action

UVLO(Under Voltage Lock Out) VIN 4.1V

DCDCP-ch MOSFETN-ch MOSFET

11.7 (OCL:Over Current Limit)

P-ch MOSFET

Protections About on Product FunctionCondition ActionOCL(Over Current Limit)

P-chMOSFET 7.85A

P-ch MOSFETN-ch MOSFET

OCL 2 OCL 75% VOUT

Figure 8. OCL vs Vout

1/2 66 1

1.5uA SS

[V]

[A]Io_ave

1/2Vout

6.5A3.9A5.89A 7.85A

[AP3440]

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SS 0.52V SS 32

Figure 9. Hiccup Timing Chart

11.8 (TSD:Thermal Shut Down)

AP3440 175 typ

Protections About on Product FunctionCondition Action

TSD(Thermal Shut down) 175 (typ)

P-ch MOSFETN-ch MOSFET

DC-DC

11.9

VIN 3V EN H VO IC N-chMOSFET 200 max VIN 3V EN

H N-ch MOSFET 200 max

T1 30uA T2 6 T2 T3 1.5uA

T1 12 T4 32 )

75%

0.52V

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12.

50

55

60

65

70

75

80

85

90

95

100

0 1 2 3 4 5

Vin=4.1V

Vin=5.05V

Vin=5.5V

1.7

1.72

1.74

1.76

1.78

1.8

1.82

1.84

1.86

1.88

1.9

0 1 2 3 4 5

Vin=4.1V

Vin=5.05V

Vin=5.5V

Figure 10. Efficiency Figure 11.Load Regulation

1.7

1.72

1.74

1.76

1.78

1.8

1.82

1.84

1.86

1.88

1.9

-40 -20 0 20 40 60 80 100 120

Io=0AIo=0.1AIo=0.3AIo=0.5AIo=0.7AIo=1.0AIo=1.3AIo=1.6AIo=2.0AIo=2.5AIo=3.0AIo=3.5AIo=4.0AIo=4.5A

Figure 12. Vout vs Ta Figure 13. Soft Start

Figure 14. Load Transient Figure 15. Shut Down

EN 5V/div

Vout500mV/div

SS 500mV/div

Iout 5A/div

Iout>3A 25ms 10%

EN 2V/div

Vout500mV/div

4ms/div

Vout 50mV/div

Iout 50mV/div

…4.5A

…2A

200us/div

1ms/div

[AP3440]

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Figure 16. Typical Application

C1 10uF±30% - -

C2 50uF±30% - -

C3 0.1uF±30% - -

C4 2.2nF±30% - -

C5 1uF±30%PWGD R1 47k ±10% - -

L - 2.2uH CLF7045NIT-2R2N-D(TDK)

Vin

Vout

C1

SGND

SW1

SW2

FSIN

SW3

CC

SW4

SW5

AP3440

ENEN

SW6

VO1

PG

SS

NCVO2

C5

R1

C2

L1

C3

C4

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VIN VIN GND VIN VIN PGND

GND GND GND

GND PGND1 4 SGNDIC

SW

SS GND VREF AP3440

Figure 18.Bottom LayerFigure 17.Top Layer

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28 QFN0505 (Unit mm) (Unit mm)

Figure 20.Recommended Land Pattern

Figure 19. Outline Dimensions

1. :AP34402. :182 3. :XXX

:Y

AP3440182XXXY

Figure 21. Marking

[AP3440]

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Date (YY/MM/DD) Revision Page Contents16/08/08 00 -

[AP3440]

016008997-J-00 2016/08- 17 -

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1.

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5.

RoHS

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7.