Panasonic AN8016NSH Datasheet

Voltage Regulators

AN8016NSH

Single-channel 1.8-volt step-up DC-DC converter control IC

■ Overview

Unit: mm

The AN8016NSH is a single-channel PWM DC-DC
converter control IC that supports low-voltage operation.
This IC allows a stepped-up voltage output to be pro­vided with a minimal number of external components. It
features a low minimum operating voltage of 1.8 V, and

1

5

0.5

10

0.2±0.1

6

due to being provided in a 10-pin surface mount package
with a 0.5 mm lead pitch, is optimal for use in miniature

+0.1

–0.05

0.15

0.625±0.100.625±0.10

1.5±0.2

high-efficiency power supplies for portable equipment.

■ Features

•

Wide operating supply voltage range: 1.8 V to 14 V

•

High-precision reference voltage circuit: 1.27 V (allow-

0.1±0.1

0.5±0.2

4.3±0.30

6.3±0.30

ance: ± 3%)

•

Supports control over a wide output frequency range:

SSOP010-P-0225

20 kHz to 1 MHz

•

Provides a fixed output current with minimal supply voltage fluctuations by using an external resistor to set the output

current with a totem pole structure in the output block.

•

Large maximum output current of ± 50 mA

•

Timer latch short-circuit protection circuit (charge current: 1.3 µA typical)

•

Low input voltage malfunction prevention circuit (U.V.L.O.) (circuit operation start voltage: 1.6 V typical)

•

On/off control function (active-high, standby current: 5 µA maximum)

•

Fixed maximum duty ratio with small sample-to-sample variations (80% ± 5%)

•

Adjustable soft start time provided by using separate DTC and S.C.P. pins.

•

Adopts a 0.5 mm lead pitch 10 pin SO flat package (SSONF-10D)

•

Adopts techniques for reducing noise, increasing the light load efficiency, and suppressing the maximum base current

when turning on the npn transistor used as the external switching element.

3.0±0.30

■ Applications

•

LCD displays, digital still cameras, PDAs

1

AN8016NSH Voltage Regulators

■ Block Diagram

CC

Off

FB

IN−

Active-high

4

10

Error amp.

1

Low level detector
comp.

1.27 V

On/off
control

1.27 V

S.C.P.
comp.

Reference

voltage supply

1.27 V

SS pin

V

CC

1 µA

Low level

clamp

0.23 V

V

5

U.V.L.O.

High level detector comp.

1.27 V

2

OSC

9

Triangular wave

generator

Latch

R
S

0.6 V

Q

Unlatch comp.

0.7 V

0.2 V

0.23 V

PWM

V

Low level

clamp

3

CC

5 µA

V

CC

30 kΩ

8

6

7

RB

Out

GND

S.C.P.

■ Pin Descriptions

Pin No. Symbol Description

1IN− Error amplifier inverting input
2 S.C.P. Time constant capacitor connection for short-circuit protection
3 SS Soft-start time-constant capacitor connection
4 Off On/off control
5VCCSupply voltage
6 Out Push-pull output
7 GND Ground
8 RB Output-current setting resistor connection pin
9 OSC Oscillator circuit timing resistor/capacitor connection pin

10 FB Error amplifier output

SS

3

Voltage Regulators AN8016NSH

■ Absolute Maximum Ratings

Parameter Symbol Rating Unit

Supply voltage V
Off pin allowable application voltage
IN− pin allowable application voltage
Out pin allowable application voltage
Supply current I
Output source current I
Output sink current I
Power dissipation

*

Operating temperature T
Storage temperature T

Note) 1. Currents or voltages may not be applied to any pins not stipulated above. For circuit currents, a positive (+) value indicates

current flowing into the IC, and a negative (−) value indicates current flowing out of the IC.

2. Items other than the storage temperature, operating temperature, and power dissipation are all stipulated at Ta = 25°C.

3. *: Ta = 85°C. For the independent IC without a heat sink. Note that the relationship between IC power dissipation and
the ambient temperature must follow the derating curve.

CC

V

OFF

V

IN−

V

OUT

CC

SO(OUT)

SI(OUT)

P

D

opr

stg

15 V
15 V

V

CC

V

15 V

 mA

−50 mA
+50 mA

115 mW

−30 to +85 °C

−55 to +150 °C

■ Recommended Operating Range

Parameter Symbol Conditions Unit

Supply voltage V
Off control pin voltage V
Output source current I
Output sink current I
Timing resistance R
Timing capacitance C
Oscillator frequency f
Short-circuit protection time C

constant setting capacitance
Output current setting resistance R

CC

OFF

SO(OUT)

SI(OUT)

OUT

SCP

1.8 to 14 V
0 to 14 V

−40 (min.) mA

40 (max.) mA

T

T

3 to 30 kΩ

100 to 10 000 pF

20 to 1 000 kHz

1 000 (min.) pF

B

0 to 10k Ω

3

AN8016NSH Voltage Regulators

■ Electrical Characteristics at VCC = 2.4 V, Ta = 25°C

Parameter Symbol Conditions Min Typ Max Unit

U.V.L.O. block

Circuit operation start voltage V

UON

Error amplifier block

Input threshold voltage V
Line regulation with input fluctuation

V
Input bias current I
High-level output voltage V
Low-level output voltage V

PWM comparator block

Output source current I

Output block

Oscillator frequency f

OUT

Maximum duty Du
High-level output voltage V
Low-level output voltage V
Output source current I
Output sink current I

SO(OUT)VO

SI(OUT)VO

Pull-down resistor R

Unlatch circuit block

Input threshold voltage V

THUL

Short-circuit protection circuit block

Input threshold voltage V
Input standby voltage V

THPC

STBY

Input latch voltage V
Charge current I

CHG

On/off control block

Input threshold voltage V
Off mode SS pin voltage V
Off mode S.C.P. pin voltage V

ON(TH)

OFF(SS)

OFF(SCP)

Whole device

Average consumption current I
Latch mode consumption current I
Standby mode current I

CC(AV)

CC(LA)RB

CC(SB)

Voltage follower 1.23 1.27 1.31 V

TH

VCC = 1.8 V to 14 V  1.0 10 mV

dV

B

EH

EL

VSS = 0.5 V −3.5 −5 −6.5 µA

SS

RT = 12 kΩ, CT = 330 pF 170 190 2 10 kHz

max

IO = −15 mA, RB = 390 Ω 1.4  V

OH

IO = 10 mA, RB = 390 Ω0.2 V

OL

= 0.9 V, RB = 390 Ω−45 −32 −20 mA
= 0.3 V, RB = 390 Ω 20 mA

O

IN

V

= 0.5 V −1.65 −1.3 − 0.95 µA

SCP

RB = 390 Ω, Duty = 50%  3.4 5.0 mA

= 390 Ω1.8 2.4 mA

1.45 1.6 1.75 V

 0.2 1.0 µA

1.85 2.0 2.15 V

0.2 V

75 80 85 %

20 30 40 kΩ

0.13 0.20 0.27 V

1.17 1.27 1.37 V

 60 120 mV
 40 120 mV

0.8 1.0 1.3 V

0.13  0.27 V

0.13  0.27 V

 5 µA

5

Voltage Regulators AN8016NSH

■ Electrical Characteristics at VCC = 2.4 V, Ta = 25°C (continued)

•

Design reference data

Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.

Parameter Symbol Conditions Min Typ Max Unit

U.V.L.O. block

Reset voltage V

Error amplifier block

VTH temperature characteristics V
Output source current I
Output sink current I

THdT

SO(FB)

SI(FB)

Open-loop gain A

PWM comparator block

SS pin voltage V

Output block

RB pin voltage V
Oscillator frequency supply f

voltage characteristics
Oscillator frequency temperature f

characteristics

Short-circuit protection circuit block

Comparator threshold voltage V

On/off control block

On/Off pin current I

OFF

R

Ta = −30°C to +85°C − 0.5 + 0.5 %
VFB = 0.5 V −40 µA
VFB = 0.5 V 2 mA

V

SS

RB = 390 Ω 0.13 V

B

VCC = 1.8 V to 14 V −1 +1%

dV

Ta = −30°C to 85°C −3 +3%

dT

THL

V

= 1.5 V 23 µA

OFF

0.8 V

80 dB

1.22 V

1.27 V

5

AN8016NSH Voltage Regulators

■ Terminal Equivalent Circuits

Pin No. Equivalent Circuit Description I/O

1IN−:I

V

CC

Error amplifier inverting input.

1

300 Ω

1.26 V

2 S.C.P.: O

2

0.23 V
3 kΩ

3 kΩ

V

CC

Latch

S

R

1.27 V

0.23 V

Low level detection comp.

Q

Output

cutoff

To the
on/off

control

circuit

Connection for the capacitor that sets the
timer latch short-circuit protection circuit time
constant. Use a capacitor with a value of
1 000 pF or higher.
The charge current I

is 1.3 µA (typical).

CHG

However, the capacitor is charged with a time
constant determined by 0.23 V and a resistance
of 6 kΩ until the pin voltage reaches 0.23 V.

3 SS: I

V

CC

Connection pin for the capacitor that determines
the PWM output soft start period. Note that the

0.23 V
3 kΩ

3 kΩ

3

PWM

C

T

Unlatch comp.

0.23 V

To the

on/off

control

circuit

S.C.P. pin

the short-circuit protection circuit does not
supply charge current to S.C.P. pin until this pin
voltage reaches about 0.2 V.
The source current I

is 5 µA (typical).

SS

However, the capacitor is charged with a time
constant determined by 0.23 V and a resistor of
6 kΩ until the pin voltage reaches 0.23 V.

4 Off: I

Internal

circuit

30 kΩ

start/stop

4

60 kΩ

This pin controls the on/off for the IC.
High-level input: normal operation
(V

> 1.3 V)

OFF

Low-level input: standby mode
(V

< 0.8 V)

OFF

In the standby state, the total IC current
consumption is decreased to 5 µA or under.

5

5

VCC: 
Power supply connection.
Provide an operating supply voltage of 1.8 V

to 14 V.

7