Anpec APW8815O, APW8815QA, APW8815QB Schematics

APW8815

High-Performance Notebook PWM Controller

Features General Description

• Adjustable Output Voltage from +0.75V to +5.5V

- 0.75V Reference Voltage

- ±1% Accuracy Over-Temperature

• Operates from An Input Battery Voltage Range of

+1.8V to +28V

• Power-On-Reset Monitoring on VCC Pin and PVCC

Pin

• Excellent Line and Load Transient Responses

• PFM Mode for Increased Light Load Efficiency

• Programmable PWM Frequency from 100kHz to

500kHz

• Integrated MOSFET Drivers

• Integrated Bootstrap Forward P-CH MOSFET

• Adjustable Integrated Soft-Start and Soft-Stop

• Selectable Forced PWM or Automatic PFM/PWM

Mode

• Power Good Monitoring

• 70% Under-Voltage Protection

• 125% Over-Voltage Protection

• Adjustable Current-Limit Protection

- Using Sense Low-Side MOSFET’s R

DS(ON)

• Over-Temperature Protection

• TSSOP-14, QFN3.5x3.5-14, and TQFN3x3-16

Packages

• Lead Free and Green Devices Available

(RoHS Compliant)

The APW8815 is a single-phase, constant-on-time,
synchronous PWM controller, which drives N-channel
MOSFETs. The APW8815 steps down high voltage to
generate low-voltage chipset or RAM supplies in notebook
computers.
The APW8815 provides excellent transient response and
accurate DC voltage output in either PFM or PWM Mode.
In Pulse Frequency Mode (PFM), the APW8815 provides
very high efficiency over light to heavy loads with loading­modulated switching frequencies. In PWM Mode, the
converter works nearly at constant frequency for low-noise
requirements.
The APW8815 is equipped with accurate positive current­limit, output under-voltage, and output over-voltage
protections, perfect for NB applications. The Power-On­Reset function monitors the voltage on VCC and PVCC to
prevent wrong operation during power-on. The APW8815
has a 1.2ms digital soft-start and built-in an integrated
output discharge device for soft-stop. An internal
integrated soft-start ramps up the output voltage with
programmable slew rate to reduce the start-up current. A
soft-stop function actively discharges the output
capacitors.
The APW8815 is available in 14pin TSSOP, 14pin QFN
and 16pin TQFN packages respectively.

Simplified Application Circuit

VCC=5V

EN

V

IN

Applications

• Notebook

• Table PC

• Hand-Held Portable

• AIO PC

R

TON

R

OCSET

PHASE

TON

OCSET

UGATE

PHASE

LGATE

Q2

Q1

L

V

OUT

APW8815

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.

Copyright  ANPEC Electronics Corp.
Rev. A.2 - Apr., 2011

www.anpec.com.tw1

APW8815

Pin Configuration

EN

1

TON

2

VOUT

VCC

FB

POK

3
4
5
6
7

TSSOP-14

(Top View)

14
13

12
11

10

9

8

BOOT
UGATE

PHASE

OCSET
PVCC

LGATE

PGNDGND

TON

VOUT

VCC

FB

POK

EN
1

2
3
4
5

6

7

GND

QFN3.5x3.5-14

(Top View)

EN

TON

NC

BOOT

BOOT

14

UGATE

13

PHASE

12

OCSET

11

PVCC

10

LGATE

9

8

PGND

V

OUT

C

V

F

O

P

C
B

K

16

15
1
2
3
4

5
NC

13

14

12
11
10

8

7

6

GND

PGND

LGATE

T

E

G

A

U

E

PHA

S

CSE

T

O

C

C

P

V

9

TQFN3x3-16

(Top View)

Ordering and Marking Information

APW8815

Assembly Material
Handling Code
Temperature Range
Package Code

APW8815 O :

APW8815 QA : XXXXX - Date Code

APW8815 QB : XXXXX - Date Code

Note: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte tin plate termination finish; which
are fully compliant with RoHS. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J-STD-020D for
MSL classification at lead-free peak reflow temperature. ANPEC defines “Green” to mean lead-free (RoHS compliant) and halogen
free (Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by
weight).

APW8815
XXXXX

APW
8815
XXXXX

APW
8815
XXXXX

Package Code
O : TSSOP-14 QA : QFN3.5x3.5-14 QB : TQFN3x3-16
Temperature Range
I : -40 to 85 oC
Handling Code
TR : Tape & Reel
Assembly Material
G : Halogen and Lead Free Device

XXXXX - Date Code

Copyright  ANPEC Electro nics Corp.
Rev. A.2 - Apr., 2011

www.anpec.com.tw2

APW8815

Absolute Maximum Ratings (Note 1)

Symbol Parameter Rating Unit

VCC VCC Supply Voltage (VCC to GND) -0.3 ~ 7 V

V

PVCC Supply Voltage (PVCC to GND) -0.3 ~ 7 V

PVCC

V

Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.

BOOT Supply Voltage (BOOT to GND or PGND) -0.3 ~ 35 V

BOOT-GND

V

BOOT Supply Voltage (BOOT to PHASE) -0.3 ~ 7 V

BOOT

All Other Pins (VOUT, OCSET, TON, EN and FB to GND) -0.3 ~ VCC+0.3 V

<400ns Pulse Width

>400ns Pulse Width

LGATE Voltage (LGATE to GND)

UGATE Voltage (UGATE to PHASE)

<400ns Pulse Width
>400ns Pulse Width

PHASE Voltage (PHASE to GND)

V

PHASE

<400ns Pulse Width

>400ns Pulse Width

V

POK Supply Voltage (POK to GND) -0.3 ~ 7 V

POK

V

PGND to GND Voltage -0.3 ~ 0.3 V

PGND

-5 ~ V

-0.3 ~ V

BOOT

BOOT

+0.3

-5 ~ VCC+0.3

-0.3 ~ VCC+0.3

-5 ~ 35

-1 ~ 28

+0.3

TJ Maximum Junction Temperature 150

T

Storage Temperature -65 ~ 150

STG

T

Maximum Soldering Temperature, 10 Seconds 260

SDR

V

V

V

o

C

o

C

o

C

Thermal Characteristics

Symbol Parameter Typical Value Unit

Thermal Resistance-Junction to Ambient

θJA

Note 2: θJA are measured with the component mounted on a high effective the thermal conductivity test board in free air. The exposed

(Note2)

QFN3.5x3.5-14

TQFN3x3-16

TSSOP-14

100

80
40

°C/W

pad of package is soldered directly on the PCB.

Recommended Operating Conditions (Note 3)

Symbol Parameter Range Unit

VIN

VCC, PVCC VCC, PVCC Supply Voltage 4.5 ~ 5.5 V

V

OUT

TA
TJ

Note 3: Refer to the typical application circuit.

Converter Input Voltage 1.8 ~ 28 V

Converter Output Voltage 0.75 ~ 5.5 V
Ambient Temperature -40 ~ 85
Junction Temperature -40 ~ 125

o

C

o

C

Copyright  ANPEC Electro nics Corp.
Rev. A.2 - Apr., 2011

www.anpec.com.tw3

APW8815

Electrical Characteristics

These specifications apply for TA=-40°C to +85°C, unless otherwise stated. All typical specifications TA=+25°C, VCC=5V,
V

=5V.

PVCC

Symbol

Parameter Test Conditions

VOUT AND VFB VOLTAGE

V

Output Voltage Adjustable output range 0.75 - 5.5 V

OUT

V

Reference Voltage - 0.75 - V

REF

TA = 25 oC -0.5 - +0.5 %

Regulation Accuracy

TA = 0 oC ~ 85 oC -0.8 - +0.8 %
TA = -40 oC ~ 85 oC -1.0 - +1.0 %

IFB FB Input Bias Current FB = 0.75V - 0.02 0.1

R

VOUT Discharge Resistance EN = 0V, V

DIS

= 0.5V - 20 50

OUT

SUPPLY CURRENT

VCC Plus PVCC Current, PWM,
EN = Float, VFB = 0.77V,

I

VCC Input Bias Current

VCC

PHASE = -0.1V
VCC Plus PVCC Current, PFM,

EN = 5V, VFB = 0.77V,
PHASE = 0.5V

I

VCC_SHDN

I

VCC_SHDN

VCC Shutdown Current EN = GND, VCC = 5V - 4.5 7.5
PVCC Shutdown Current EN = GND, PVCC = 5V - 0 1.0

ON-TIME TIMER AND INTERNAL SOFT-START

V

= 12V, V

T

Nominal On Time

ONN

T

Fast On Time

ONF

T

Slow On Time

ONS

T

ON(MIN)

T

OFF(MIN)

Minimum On Time 80 110 140 ns
Minimum Off Time

PHASE

R

= 250kΩ

TON

V

= 12V, V

PHASE

R

= 100kΩ

TON

V

= 12V, V

PHASE

R

= 400kΩ

TON

VFB = 0.7V, V
OCSET = OPEN

TSS Internal Soft-Start Time EN High to V

= 2.5V,

OUT

= 2.5V,

OUT

= 2.5V,

OUT

= -0.1V,

PHASE

Regulation 0.9 1.2 1.5 ms

OUT

GATE DRIVER

UG Pull-Up Resistance BOOT-UG = 0.5V - 5 7
UG Sink Resistance UG-PHASE = 0.5V - 1 2.5
LG Pull-Up Resistance PVCC-LG = 0.5V - 5 7
LG Sink Resistance LG-PGND = 0.5V - 0.9 2.5
UG to LG Dead Time UG falling to LG rising, no load - 40 - ns
LG to UG Dead Time LG falling to UG rising, no load - 40 - ns

BOOTSTRAP SWITCH

VF Ron V

IR Reverse Leakage

PVCC

V

BOOT-GND

V

PVCC

- V

BOOT-GND

= 30V, V

= 5V

, IF = 10mA - 0.5 0.8 V

= 25V,

PHASE

Min.

APW8815

Typ. Max.

Unit

µA

- 400 750

- 250 470

µA

µA

µA
µA

- 749 - ns

280 330 380 ns

- 1170 - ns

350 450 550 ns

- - 0.5

µA

Ω

Ω
Ω
Ω
Ω

Copyright  ANPEC Electro nics Corp.

www.anpec.com.tw4

Rev. A.2 - Apr., 2011

APW8815

Electrical Characteristics (Cont.)

These specifications apply for TA=-40°C to +85°C, unless otherwise stated. All typical specifications TA=+25°C, VCC=5V,
V

=5V.

PVCC

Symbol

Parameter Test Conditions

VCC POR THRESHOLD

V

PVCC_THR

V

VCC_THR

Rising PVCC POR Threshold
Voltage

Rising VCC POR Threshold
Voltage

4.2 4.35 4.45 V

4.2 4.35 4.45 V

VCC POR Hysteresis - 100 - mV

CONTROL INPUTS

EN High Threshold 2.5 2.65 2.8 V
Hysterisis 100 175 225 mV
EN Float Threshold 1.37 1.95 2.39 V
EN Low Threshold 0.7 1.0 1.3 V
Hysterisis 150 200 250 mV

EN Leakage

EN = 0V - 0.1 1.0
EN = 5V - - 2.0

POWER-OK INDICATOR

POK in from Lower (POK Goes
High)

V

POK Threshold

POK

POK Low Hysteresis (POK Goes
Low)

POK out from Normal (POK Goes
Low)

I

POK Leakage Current V

POK

POK Sink Current V

= 5V - 0.1 1.0

POK

= 0.5V 2.5 7.5 - mA

POK

POK Debounce Time 43 63 85
POK Enable Delay Time EN High to POK High 1.4 2.0 2.6 ms

CURRENT SENSE

I

OCSET

T

CIOCSET

V

ROCSET

I

OCP Threshold I

OCSET

I

Temperature

OCSET

Coefficient
Current-Limit Threshold

Setting Range
Over Current-Limit

Comparator Offset
Zero Crossing Comparator

Offset

Sourcing 9 10 11

OCSET

On The Basis of 25°C - 4500 ­V

OCSET-GND

Voltage, Over All

Temperature
(V

OCSET-GND-VPGND-PHASE

V

OCSET-GND

V

PGND-PHASE

= 60mV

Voltage, EN = 3.3V -9.5 0.5 10.5 mV

) Voltage,

PROTECTION

VUV UVP Threshold 60 70 80 %

UVP Hysteresis - 3 - %
UVP Debounce Interval - 16 ­ UVP Enable Delay EN High to UVP Workable 1.4 2 2.6 ms

APW8815

Min. Typ. Max.

Unit

µA

87 90 93 %

- 3 - %

120 125 130 %

µA

µs

µA

ppm/

o

30 - 200 mV

-10 0 10 mV

µs

C

Copyright  ANPEC Electro nics Corp.

www.anpec.com.tw5

Rev. A.2 - Apr., 2011

APW8815

Electrical Characteristics (Cont.)

These specifications apply for TA=-40°C to +85°C, unless otherwise stated. All typical specifications TA=+25°C, VCC=5V,
V

=5V.

PVCC

Symbol

Parameter Test Conditions

PROTECTION (CONT.)

V

OVP Rising Threshold 120 125 130 %

OVR

OVP Propagation Delay VFB Rising, DV = 10mV - 1.5 -

T

OTP Rising Threshold

OTR

OTP Hysteresis

Note 4: Guaranteed by design.

(Note 4)

- 160 -

(Note 4)

- 25 -

Min.

APW8815

Typ. Max.

Unit

µs

o

C

o

C

Copyright  ANPEC Electro nics Corp.

www.anpec.com.tw6

Rev. A.2 - Apr., 2011

APW8815

Typical Operating Characteristics

0.760

(V)

REF

0.755

0.750

0.745

Reference Voltage Accuracy, V

0.740

(kHz)

SW

Reference Voltage Accuracy vs.

Junction Temperature

-50 -30 10 50 90 1107030-10
Junction Temperature, TJ (oC)

Switching Frequency vs.

Converter Output Current

1000

Forced-PWM Mode

100

OCSET Sourcing Current vs.

Junction Temperature

16

(µA)

14

OCSET

12

10

8

6

OCSET Sourcing Current, I

4

-50 -30 10 50 90 110 1507030-10 130
Junction Temperature, TJ (oC)

Converter Output Voltage vs.

Converter Output Current

1.070

(V)

OUT

1.060

VIN=19V,
V

=1.05V,

OUT

FSW=200kHz

10

Automatic PFM/PWM Mode

1

Switching Frequency, F

0.1

0.001 0.01 0.1

1

Converter Output Current, I

Switching Frequency vs. TON Resistance

800

700

(kHz)

600

SW

500
400

300

200

Switching Frequency, F

100

0

100

V

OUT

↑

=1.05V

TON Resistance, R

Copyright  ANPEC Electro nics Corp.
Rev. A.2 - Apr., 2011

VIN=19V, Forced-PWM Mode

V

=2.5V

OUT

↓

VIN=19V,
V

=1.05V,

OUT

FSW=300kHz

10

OUT

(kΩ)

TON

(A)

100

700600500400300200

Converter Output Voltage, V

1.050

1.040

1.030

Automatic PFM/PWM Mode

Forced-PWM Mode

0

Converter Output Current, I

987654321 10

(A)

OUT

www.anpec.com.tw7

APW8815

Operating Waveforms

Refer to the typical application circuit. The test condition is VIN=19V, TA=25oC unless otherwise specified.

Enable at Zero Initial Voltage of V

I

=5A

LOAD

1

2

3

4

CH1: VEN, 5V/Div, DC
CH2: V
CH3: V
CH4: V
TIME: 1ms/Div

, 500mV/Div, DC

OUT

, 20V/Div, DC

PHASE

, 5V/Div, DC

POK

Shutdown at I

OUT

=5A

OUT

Enable Before End of Soft-Stop

No Load

1

2

3

4

CH1: VEN, 5V/Div, DC
CH2: V
CH3: V
CH4: V
TIME: 1ms/Div

, 500mV/Div, DC

OUT

, 20V/Div, DC

PHASE

, 5V/Div, DC

POK

Shutdown with Soft-Stop at No Load

1

2
3

4

CH1: VEN, 5V/Div, DC
CH2: V
CH3: V
CH4: V
TIME: 20µs/Div

, 500mV/Div, DC

OUT

, 20V/Div, DC

PHASE

, 5V/Div, DC

POK

Copyright  ANPEC Electro nics Corp.
Rev. A.2 - Apr., 2011

1

2
3

4

CH1: VEN, 5V/Div, DC
CH2: V
CH3: V
CH4: V
TIME: 20ms/Div

, 500mV/Div, DC

OUT

, 20V/Div, DC

PHASE

, 5V/Div, DC

POK

www.anpec.com.tw8

APW8815

Operating Waveforms (Cont.)

Refer to the typical application circuit. The test condition is VIN=19V, TA=25oC unless otherwise specified.

Load Transient

V

=1.05V, 1A->8A->1A

OUT

1

2

3

CH1: V

, 100mV/Div, AC

OUT

CH2: IL, 5A/Div, DC
CH3: I

, 5A/Div, DC

OUT

TIME: 20µs/Div

Mode Transient From PFM to PWM

Load Transient

V

=2.5V, 1A->10A->1A

OUT

1

2

3

CH1: V

, 100mV/Div, AC

OUT

CH2: IL, 5A/Div, DC
CH3: I

, 5A/Div, DC

OUT

TIME: 20µs/Div

Mode Transient From PWM to PFM

1

2

3

4

CH1: V
CH2: V
CH3: V

, 100mV/Div, AC

OUT

, 10V/Div, DC

PHASE

, 5V/Div, DC

LGATE

CH4: VEN, 5V/Div, DC
TIME: 10µs/Div

Copyright  ANPEC Electro nics Corp.
Rev. A.2 - Apr., 2011

1

2

3

4

CH1: V
CH2: V
CH3: V

, 100mV/Div, AC

OUT

, 10V/Div, DC

PHASE

, 5V/Div, DC

LGATE

CH4: VEN, 5V/Div, DC
TIME: 10µs/Div

www.anpec.com.tw9