Panasonic AN8011S Datasheet

Voltage Regulators

0.3

(0° to 10°)

(0.15)

10.1±0.3

4.2±0.3

6.5±0.3

18

16 9

1.27

(0.605)

Seating plane Seating plane

0.40±0.25

0.1±0.1 1.5±0.2

AN8011S

2-channel step-down, step-up, or inverting use
DC-DC converter control IC

Unit: mm

■ Overview

The AN8011S is a DC-DC converter control IC
with two-channel output using the PWM method
which allows 500 kHz high-speed control.

Respecitve output operation can be completely
synchronized with each other by using the same
oscillation output.

■ Features

• PWM control frequency of 500 kHz is available.

• Wide operating supply voltage range

(V

= 3.6 V to 34 V)

CC

• Built-in 2-channel of open collector type for out-

put (A single-channel is also usable for inverted
amplification type)

• Each output can be stopped independently by the

external control .

• Built-in on/off function for the operation/stop of IC Incorporating circuit for short-circuit portection and under-

voltage lock-out (U.V.L.O.)

• The latch circuit is externally controllable.

• Low consumption current (during operation: 5 mA, during standby: 2 µA)

SOP016-P-0225A

■ Applications

• LCD displays, digital still cameras, and PDAs

■ Block Diagram

REF

V

16

V

REF

U.V.L.O.

OSC

1

CT

Latch

15

Latch

2

RT

IN+

14

Unlatch pro.

Short pro.

Unlatch pro.

On/
Off

3

On/Off

IN−1

13

Error amp.

Error amp.

4

IN−2

12

FB1

5

FB2

11

PWM1

PWM2

6

DTC1

DTC2

10

7

Out1

Out2

9

8

CC

V

GND

1

AN8011S Voltage Regulators

■ Pin Descriptions

Pin No. Symbol Description

1 CT Pin for connecting the oscillation frequency setting capacitor for triangular oscillation

circuit. Frequecy of triangular oscillation is set by connecting a capacitor between this
terminal and GND.

2 RT Resistor connection pin for setting the oscillation frequency of triangular oscillation

circuit. Frequecy of triangular oscillation is set by connecting resistance between the
pin and GND

3 On/Off "On/Off" pin for turning on/off IC. "Low" stops IC (output off) and "High" operates IC.
4IN−2 Inverted input pin for channel 2 error amplifier
5 F/B 2 Output pin for channel 2 error amplifier. Gain setting or phase compensation is per-

formed by connecting resistor or capacitor between the pin and IN−2. It is also connected
to PWM short-circuit protecion.

6 DTC 2 Pin for setting dead-time period of channel 2. The dead-time of channel 2 is set by

connecting external resistor. Soft start function can be also given by connecting capaci­tor in parallel with the external resistor. In addition, only channel 2 output can be turned
off by decreasing the pin voltage to below 0.12 V. (short-circuit protection function stop

circuit)
7 Out 2 Channel 2 open-collector type output pin. IO = 100 mA maximum
8 GND Grounding pin of signal system.
9VCCPower supply voltage application pin. It detects start voltage and stop voltages

10 Out 1 Channel 1 open-collector type output pin. IO = 100 mA maximum
11 DTC 1 Pin for setting dead-time period of channel 1. The dead-time period of channel 1 is set

by connecting external resistor. Soft start function can be also given by connecting capacitor

in parallel with the external resistor. In addition, only channel 1 output can be turned off

by decreasing the pin voltage to below 0.12 V. (short-circuit protection function stop

circuit)

12 F/B 1 Output pin for channel 1 error amplifier. Gain setting or phase compensation is per

formed by connecting resistor or capacitor between the pin and IN−1. It is also con

nected to PWM short-circuit protection.

13 IN−1 Inverted input pin for channel 1 error amplifier.
14 IN+ Pin for noninverted input of channel 1error amplifier.
15 Latch Pin for connecting the time constant setting capacitor for timer latch type short-circuit

protection circuit. The time constant for short-circuit protection is set by connecting

a capacitor between this terminal and GND.

16 V

REF

Internal reference voltage output pin (2.5 V(allowance: ±3%)). If a load of 20 mA typical

or more is applied, the overcurrent protection operates to reduce V

and switching

REF

operation stops.

2

Voltage Regulators AN8011S

■ Absolute Maximum Ratings at Ta = 25°C

Parameter Symbol Rating Unit

Supply voltage V
Power dissipation

*

Operating ambient temperature T
Storage temperature T

Note) 1 . Do not apply ecternal currents or voltages to any pins not speifically mentioned.

For circuit currents, '+' denotes current flowing into the IC, and '−' denotes current flowing out of the IC.

2*: When using the IC at Ta of 25°C or more, the power dessipation should be decreased 3.8 mW per 1°C.

CC

P

D

opr

stg

■ Recommended Operating Range

Parameter Symbol Range Unit

Supply voltage V

CC

■ Electrical Characteristics at VCC = 12 V, Ta = 25°C

Parameter Symbol Conditions Min Typ Max Unit

Reference voltage block

Output voltage V
Input regulation with input fluctuation Line VCC = 3.6 V to 34 V  320mV
Load regulation Load I
Output voltage temperature V

characteristics 1

*

Output voltage temperature V
characteristics 2

*

Overcurrent protection drive current *I

U.V.L.O. block

Circuit operation start voltage V
Hysteresis width V

Error amplifier block 1

Input offset voltage 1 V
Input current 1 I
Common-mode input voltage range V
High-level output voltage 1 V
Low-level output voltage 1 V

Error amplifier block 2

Input current 2 I
Common mode input threshold voltage
High-level output voltage 2 V
Low-level output voltage 2 V

REF

= 0 mA to 5 mA  210mV

REF

TC1Ta

TC2Ta

CC

UON

HYS

IN-O1

B1

CM

EH1

EL1

B2

= −25°C to + 25°C ±1  %

= 25°C to 85°C ±1  %

VIN+ 0.72 0.75 0.78 V

EH2

EL2

35 V

380 mW

−30 to +85 °C

−40 to +125 °C

3.6 to 34 V

2.413 2.5 2.588 V

−20  mA

2.8 3.1 3.4 V

100 200 300 mV

−6  6mV

−500 −25 100 nA

0.5  0.8 V

V

− 0.3

REF

 V

0.5 V

25  100 nA

V

− 0.3

REF

 V

0.5 V

3

AN8011S Voltage Regulators

■ Electrical Characteristics(continued) at VCC = 12 V, Ta = 25°C

Parameter Symbol Conditions Min Typ Max Unit

PWM comparator 1/2 block

High-level input threshold voltage V
Low-level input threshold voltage V
Input current I

DT-HfOSC

DT-LfOSC

DTC

Output 1/2 block

Output frequency 1 f
Frequency 1 f

OUT1CT

dv

Output duty ratio 1 Du1CT = 150 pF, RT = 20 kΩ, R
Output duty ratio 2 Du2CT = 150 pF, RT = 20 kΩ, R
Output saturation voltage 1 V
Output saturation voltage 2 V
Output leak current 1 I

Frequency temperature characteristics 1 *f
Frequency temperature characteristics 2 *f
Output frequency 2
Frequency 2

*

*

O(sat)1IO

O(sat)2IO

OLe1

dT1fOSC

dT2fOSC

f

OUT2CT

f

dv2

Short-circuit protection block

Input threshold voltage V
Latch drive voltage V
Charge current

SLTH

SLON

I

CHG

Unlatch pro. 1/2 block

Input threshold voltage V

ULTH

On/off block

Threshold voltage V

TH

Whole device

Total consumption current
Total consumption current fluctuation
Standby consumption current I
Maximum standby consumption current I

Note)*: These characteristics are theoretical values based on the IC design and are not guaranteed.

I

CC

I

CC(max.)VCC

CC(SB)VCC

CC(SB-M)VCC

= 200 kHz, duty = 100% 1.2  V

= 200 kHz, duty = 100% 0.6 V

RT = 20 kΩ−37 −34 −31 µA

= 150 pF, RT = 20 kΩ, IO = 30 mA

180 200 220 kHz

VCC = 3.6 V to 34 V −2  2%
CT = 150 pF, RT = 20 kΩ

DTC

DTC

= 24 k Ω
= 33 k Ω

40 45 50 %
65 75 85 %

= 30 mA 0.9 V
= 100 mA 1.2 V

V

= 34 V, when output 10 µA

CC

transistor is off

= 200 kHz, Ta = −30°C to +25°C
= 200 kHz, Ta = 25°C to 85°C

= 150 pF, RT = 6.6 kΩ, IO = 30 mA

±9  %
±9  %
 500  kHz

VCC = 3.6V to 34V, ±2  %
CT = 150 pF, RT = 6.6 kΩ

1.75 1.85 1.95 V

1.15 1.25 1.35 V

−120 −50 −40 µA

0.12  V

0.8  2V

VCC = 12 V, RT = 20 kΩ57mA

= 3.6 V to 34 V, RT = 20 kΩ  2mA
= 12 V, V
= 34 V, V

is down  2 µA

REF

is down  5 µA

REF

4

Voltage Regulators AN8011S

■ Terminal Equivalent Circuits

Pin No. Equivalent circuit Description I/O

1 CT: O

V

REF

16

To PWM input

OSC
comp.

2 RT: I

V

REF

16

OSC PWM

The terminal used for connecting a timing
capacitor to set oscillator frequency. Use a

I

O

capacitance value within the range of 100 pF

CT

to 0.1mF. For frequency setting method, re-

1

fer to the "Application Notes, [2] Function
descriptions" section. Use the oscillation fre-

2I

O

quency in the range of 1 kHz to 500 kHz.

The terminal used for connecting a timing
resistor to set oscillattion frequency.
Use a resistance value ranging from 5.1 kΩ
to 20 kΩ.
The terminal voltage is 0.67 V typ.

RT (= 0.67 V)

2

3 On/Off: I

The terminal for on/off control.
High-level input: normal operation
(V

ON/OFF

> 2.0 V typ.)

Low-level input: standby state
(V

ON/OFF

< 0.8 V typ.)

On/Off

3

Internal
circuit start/stop

17 kΩ

13 kΩ

The total current consumption in the standby
state can be suppressed to a value below 5 µA.

4IN−2: I

V

REF

16

The terminal for the inverted input of ch.2
error amplifier. Use a common-mode input
ranging from − 0.1 V to 0.8 V.

0.75 V

4

IN−2

5