Panasonic AN8049FHN Datasheet

Voltage Regulators

AN8049FHN

1.8-volt 3-channel step-up, step-down, and polarity inverting
DC-DC converter control IC

■ Overview

The AN8049FHN is a three-channel PWM DC-DC
converter control IC that features low-voltage operation.
This IC can form a power supply that provides two step­up outputs and one step-down or polarity inverted output
with a minimal number of external components. Minimal
operating supply voltage of this IC is as low as 1.8 V, so
that it can operate from 2 dry-batteries.

And also, it is housed in an ultrathin, 4-directional-

5.2±0.2 (1.10) 3.0±0.2

5.0±0.1

19 13

20

24

1

R0.3

3-C0.5

12

8

lead SMD-package whose thickness is 0.8 mm maximum
and pin-pitch is 0.5 mm therefore it is most suitable for
making a power supply small and thin.

0.10

Seating plane

■ Features

• Wide operating supply voltage range: 1.8 V to 14 V

• High-precision reference voltage circuit

— V

pin voltage: ±1%

REF

— Error amplifier: ±1.5%

• Ultrathin surface mounting package for miniaturized and thinner power supplies

Package: QFN-24

0.5-mm lead pitch

5.4 mm × 4.4 mm × t 0.8 mm

• Supports control over a wide output frequency range: 20 kHz to 1 MHz

• On/off (sequence control) pins provided for each channel for easy sequence control setup

• The negative supply error amplifier supports 0-volt input.

Common-mode input voltage range: − 0.1 V to V

−1.4 V

CC

This allows the number of external components to be reduced by two resistors.

• Fixed duty factor: 86%

However, the duty can be adjusted to anywhere from 0% to 100% with an external resistor.

• Timer latch short-circuit protection circuit (charge current: 1.1 µA typical)

• Low input voltage malfunction prevention circuit (U.V.L.O.)

(operation start voltage: 1.67 V typical)

• Standby function (active-high control input, standby mode current: 1 µA maximum)

QFN024-P-0405

4.0±0.1

4.2±0.2

0.80max.

0.2±0.1

3.0±0.1

S

A

4.0±0.1

13

12

8

7

0.50

Unit: mm

19

17

0.2±0.1

20

2.0±0.2 (1.10)

24

0.10 SSA B

B

M

■ Applications

• Electronic equipment that requires a power supply system

1

AN8049FHN Voltage Regulators

■ Block Diagram

S.C.P.

FB3

IN+3
IN−3

DT3

CTL3

IN-121FB122CTL1

Error
amplifier 1

1.26 V

23

18

S.C.P. comp.

Error
amplifier 2

16
17

24

3

Error
amplifier 3

1.26 V

19

20

V

REF

5

1.1 mA

0.9 V

1.1 mA

20 kΩ

V

CC

50 kΩ50 kΩ

20 kΩ

CC

V

14

Reference voltage

supply

1.26 V

U.V.L.O.

1.26 V

1.1 mA

1.1 mA

20 kΩ

4

7

V

REF

1.26 V

(Allowance: ±1%)

R

Q

S

Latch

1.26 V

1.26 V

REF

V

2

DT1

50 kΩ

OSC

15

Triangular wave generator

50 kΩ

PWM1

PWM3

PWM2

1

0.7 V

0.3 V

V

REF

50 kΩ
50 kΩ

Off

6

On/off
control

V

CC

V

CC

9

RB1

10

OUT1

30 kΩ

13

OUT3

8

RB2

11

OUT2

30 kΩ

12

GND

IN−2

FB2

■ Pin Descriptions

Pin No. Description

1 DT2
2 DT1
3 CTL3
4 CTL2
5 CTL1
6 Off
7V
8 RB2

9 RB1
10 OUT1
11 OUT2
12 GND

2

REF

CTL2

DT2

Pin No. Description

13 OUT3
14 V

CC

15 OSC
16 IN+3
17 IN−3
18 FB3
19 IN−2
20 FB2
21 IN−1
22 FB1
23 S.C.P.
24 DT3

Voltage Regulators AN8049FHN

■ Absolute Maximum Ratings

Parameter Symbol Rating Unit

Supply voltage V
Off pin allowable application voltage V
Error amplifier input allowable V
application voltage

*2

OUT1 and OUT2 pin output I

CC

OFF

IN

SO(OUT)

source current
OUT3 pin output current I
Power dissipation

*1

Operating temperature T
Storage temperature T

Note)*1: Ta = 85°C. For the independent IC without a heat sink.

2: When VCC is less than 6 V, V

*

IN−1

SI(OUT)

and V

P

D

opr

stg

must be VCC.

IN+2

14.2 V

14.2 V
V

CC

V

−50 mA

+50 mA

111 mW

−30 to +85 °C

−55 to +150 °C

■ Recommended Operating Range

Parameter Symbol Range Unit

Off pin application voltage V
OUT1 and OUT2 pin output source current I
OUT3 pin output current I
Timing resistance R
Timing capacitance C
Oscillator frequency f
Short-circuit protection time-constant setting capacitance C
Output current setting resistance R

OFF

SO(OUT)

SI(OUT)

T

T

OUT

SCP

B

0 to 14 V

−40 (min.) mA

40 (max.) mA

3 to 33 kW

100 to 1 000 pF

20 to 1 000 kHz

1 000 (min.) pF

750 to 15 000 Ω

3

AN8049FHN Voltage Regulators

■ Electrical Characteristics at V

= 2.4 V, C

CC

Parameter Symbol Conditions Min Typ Max Unit

Reference voltage block

Reference voltage V

REFIREF

Line regulation with input fluctuation Line V
Load regulation Load I
V

temperature characteristics V

REF

V

pin short-circuit current I

REF

RFEdTTa

OC

U.V.L.O. block

Circuit operation start voltage V

UON

Error amplifier 1 block

Input threshold voltage 1 V
Input bias current 1 I
High-level output voltage 1 V
Low-level output voltage 1 V
Output source current 1 I
Output sink current 1 I
VTH temperature characteristics 1 V
Open-loop gain 1 A

TH1

B1

EH1

EL1

SO(FB)1

SI(FB)1

THdT1Ta

V1

Error amplifier 2 block

Input threshold voltage 2 V
Input bias current 2 I
High-level output voltage 2 V
Low-level output voltage 2 V
Output source current 2 I
Output sink current 2 I
VTH temperature characteristics 2 V
Open-loop gain 2 A

TH2

B2

EH2

EL2

SO(FB)2

SI(FB)2

THdT2Ta

V2

Error amplifier 3 block

Input offset voltage V
Common-mode input voltage range V

Input bias current 3 I
High-level output voltag 3 V
Low-level output voltage 3 V
Output source current 3 I
Output sink current 3 I
Open-loop gain 3 A

IO

ICR

B3

EH3

EL3

SO(FB)3

SI(FB)3

V3

= 0.1 µF, Ta = 25°C

REF

= − 0.1 mA 1.247 1.26 1.273 V

= 1.8 V to 14 V  220mV

CC

= −0.1 mA to −1 mA −20 −3  mV

REF

= −30°C to +85°C  1  %

−10  mA

1.59 1.67 1.75 V

1.241 1.26 1.279 V

 0.1 0.2 µA

1.0 1.2 1.4 V

0.2

−38 −31 −24 µA

0.5 mA

= −30°C to +85°C  1.5  %

 80  dB

1.241 1.26 1.279 V

 0.1 0.2 µA

1.0 1.2 1.4 V

0.2

−38 −31 −24 µA

0.5 mA

= −30°C to +85°C  1.5  %

 80  dB

−6  6mV

− 0.1  V

CC

−1.4

− 0.6 − 0.3 µA

1.0 1.2 1.4 V

0.2

−38 −31 −24 µA

0.5 mA
 80  dB

V

4

Voltage Regulators AN8049FHN

■ Electrical Characteristics (continued) at V

= 2.4 V, C

CC

= 0.1 µF, Ta = 25°C

REF

Parameter Symbol Conditions Min Typ Max Unit

Oscillator block

Oscillator frequency f
Frequency supply voltage f

RT = 7.5 kΩ, CT = 680 pF 170 190 210 kHz

OUT

RT = 7.5 kΩ, CT = 680 pF  1  %

DV

characteristics
Frequency temperature f

RT = 7.5 kΩ, CT = 680 pF  3 %

DT

characteristics

Output 1 block

Output duty factor 1 Du1RT = 7.5 kΩ, CT = 680 pF 80 86 92 %
High-level output voltage 1 V
Low-level output voltage 1 V
Output source current 1 I
Output sink current 1 I

SO(OUT)1VO

SI(OUT)1VO

Pull-down resistor 1 R

OH1IO

OL1IO

O1

= −10 mA, RB = 1 kΩ VCC −1  V
= 10 mA, RB = 1 kΩ0.2 V

= 0.7 V, RB = 1 kΩ−32 −27 −22 mA
= 0.7 V, RB = 1 kΩ 40 mA

20 30 40 kΩ

Output 2 block

Output duty factor 2 Du2RT = 7.5 kΩ, CT = 680 pF 80 86 92 %
High-level output voltage 2 V
Low-level output voltage 2 V
Output source current 2 I
Output sink current 2 I

SO(OUT)2VO

SI(OUT)2VO

Pull-down resistor 2 R

OH2IO

OL2IO

O2

= −10 mA, RB = 1 kΩ VCC −1  V
= 10 mA, RB = 1 kΩ0.2 V

= 0.7 V, RB = 1 kΩ−32 −27 −22 mA
= 0.7 V, RB = 1 kΩ 40 mA

20 30 40 kΩ

Output 3 block

Output duty factor 3 Du3RT = 7.5 kΩ, CT = 680 pF 80 86 92 %
Output saturation voltage V

O(SAT)

0.2 V

Short-circuit protection circuit block

Input standby voltage V
Input threshold voltage V
Input latch voltage V
Charge current I
Comparator threshold voltage V

STBY

THPC

IN

CHG

THL

V

= 0 V −1.3 −1.0 −0.7 µA

SCP

0.1 V

0.8 0.9 1.0 V

0.1 V

 1.26  V

On/off control block

Input threshold voltage V
Off pin current I

ON(TH)

OFF

V

= 5 V  35 µA

OFF

0.7 1.0 1.3 V

CTL block

Input threshold voltage V
Charge current I

THCTL

CTL

V

= 0 V −1.3 −1.0 −0.7 µA

CTL

1.07 1.26 1.47 V

Whole device

Average consumption current I
Standby mode current I

CC(OFF)RB

CC(SB)

= 9.1 kΩ, duty = 50%  4.2 5.5 mA

 1 µA

5

AN8049FHN Voltage Regulators

■ Terminal Equivalent Circuit

Pin No. Equivalent circuit Description I/O

1 DT2: I

Sets the channel 2 soft start time.
Set the time by connecting a capacitor

7 1520

50 kΩ

1

50 kΩ

PWM2

2 DT1:

227

15

50 kΩ

2

50 kΩ

PWM1

3 CTL3: I

V

CC

20 kΩ

1.1 µA

High
channel 3 operation

1.26 V

is turned off.

3

between this pin and ground.
Note that although the channel 2
maximum on duty is set internally to
86%, the maximum on duty can be set
to a value of 86% or less by inserting
a resistor between this pin and ground,
and can be set to a value of 86% or
more by inserting a resistor between
this pin and the V

REF

pin.

Sets the channel 1 soft start time.
Set the time by connecting a capacitor
between this pin and ground.
Note that although the channel 1
maximum on duty is set internally to
86%, the maximum on duty can be set
to a value of 86% or less by inserting
a resistor between this pin and ground,
and can be set to a value of 86% or
more by inserting a resistor between
this pin and the V

REF

pin.

Controls the on/off state of channel 3.
A delay can be provided in the power
supply turn-on start time by connecting
a capacitor between this pin and ground.
t

= 1.26 (V) × C

DLY3

(µF)/1.1 (µA) (s)

CTL3

This pin can also be used to control the
on/off state with an external signal.
In that case, the allowable input voltage
range is from 0 V to V

. Note that

CC

during U.V.L.O. and timer latch
operation, this pin is connected to
ground through a 20 kΩ resistor.

6

Voltage Regulators AN8049FHN

■ Terminal Equivalent Circuit (continued)

Pin No. Equivalent circuit Description I/O

4 CTL2: I

Controls the on/off state of channel 2.

V

CC

20 kΩ

1.1 µA

High
channel 2 operation

1.26 V

is turned off.

4

5 CTL1: I

V

CC

20 kΩ

1.1 µA

High
channel 1 operation

1.26 V

is turned off.

5

6 Off: I

Start and stop of
internal circuits.

6

100 kΩ

7V

V

CC

7

A delay can be provided in the power
supply turn-on start time by connecting
a capacitor between this pin and ground.
t

= 1.26 (V) × C

DLY2

(µF)/1.1 (µA) (s)

CTL2

This pin can also be used to control the
on/off state with an external signal.
In that case, the allowable input voltage
range is from 0 V to V

. Note that

CC

during U.V.L.O. and timer latch
operation, this pin is connected to
ground through a 20 kΩ resistor.

Controls the on/off state of channel 1.
A delay can be provided in the power
supply turn-on start time by connecting
a capacitor between this pin and ground.
t

= 1.26 (V) × C

DLY1

(µF)/1.1 (µA) (s)

CTL1

This pin can also be used to control the
on/off state with an external signal.
In that case, the allowable input voltage
range is from 0 V to V

. Note that

CC

during U.V.L.O. and timer latch
operation, this pin is connected to
ground through a 20 kΩ resistor.

Controls the on/off state.
When the input is high: normal
operation
(V

> 1.2 V)

OFF

When the input is low: standby mode
V

< 0.6 V)

OFF

In standby mode, the total current
consumption is held to under 1 µA.

:O

REF

Outputs the internal reference voltage.
The reference voltage is 1.26 V
(allowance: ±1%) when V
and I

is −0.1 mA. Insert a capacitor

REF

of at least 0.1 µF between V

is 2.4 V

CC

REF

and

ground for phase compensation.

7