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AN8011S-E1V

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
Voltage Regulators
1
Publication date: December 2001 SDH00002BEB
AN8011S
2-channel step-down, step-up, or inverting use
DC-DC converter control IC
■ 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.
Respective 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
CC
= 3.6 V to 34 V)
• 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 protec-
tion 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)
■ Applications
• LCD displays, digital still cameras, and PDAs
■ Block Diagram
Unit: mm
SOP016-P-0225A
0.3
(0.15)
10.1±0.3
4.2±0.3
6.5±0.3
18
16 9
1.27
Seating plane
Seating plane
0.40±0.250.4
0.1±0.1 1.5±0.2
V
REF
V
CC
Out1
DTC1
FB1
IN−1
IN+
Latch
U.V.L.O.
OSC
Latch
On/
Off
Unlatch pro.
Unlatch pro.
Short pro.
Error amp.
Error amp.
PWM1
PWM2
16
15
14
13
12
11
10
9
V
REF
1
CT
2
3
RT
On/Off
4
IN−2
FB2
5
6
DTC2
7
Out2
8
GND
Note) The package of this product will be changed to lead-free type
(SOP016-P-0225E). See the new package dimensions section
later of this datasheet.
AN8011S
2
SDH00002BEB
■ Pin Descriptions
Pin No. Symbol Description
1 CT Pin for connecting the oscillation frequency setting capacitor for triangular oscillation
circuit. Frequency 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. Frequency 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 perfor-
med by connecting resistor or capacitor between the pin and IN−2. It is also connected
to PWM short-circuit protection.
6 DTC 2 Pin for setting dead-time period of channel 2. The dead-time of channel 2 is set by conn-
ecting 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. I
O
= 100 mA maximum
8 GND Grounding pin of signal system.
9V
CC
Power supply voltage application pin. It detects start voltage and stop voltages
10 Out 1 Channel 1 open-collector type output pin. I
O
= 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 perfor-
med by connecting resistor or capacitor between the pin and IN−1. It is also connected
to PWM short-circuit protection.
13 IN−1 Inverted input pin for channel 1 error amplifier.
14 IN+ Pin for noninverted input of channel 1 error 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 capa-
citor 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
REF
and switching
operation stops.
AN8011S
3
SDH00002BEB
■ Recommended Operating Range
Parameter Symbol Range Unit
Supply voltage V
CC
3.6 to 34 V
Parameter Symbol Conditions Min Typ Max Unit
Reference voltage block
Output voltage V
REF
2.413 2.5 2.588 V
Input regulation with input fluctuation Line V
CC
= 3.6 V to 34 V 320mV
Load regulation Load I
REF
= 0 mA to 5 mA 210mV
Output voltage temperature V
TC1
T
a
= −25°C to + 25°C ±1 %
characteristics 1
*
Output voltage temperature V
TC2
T
a
= 25°C to 85°C ±1 %
characteristics 2
*
Overcurrent protection drive current
*
I
CC
−20 mA
U.V.L.O. block
Circuit operation start voltage V
UON
2.8 3.1 3.4 V
Hysteresis width V
HYS
100 200 300 mV
Error amplifier block 1
Input offset voltage 1 V
IN-O1
−6 6mV
Input current 1 I
B1
−500 −25 100 nA
Common-mode input voltage range V
CM
0.5 0.8 V
High-level output voltage 1 V
EH1
V
REF
−
0.3
 V
Low-level output voltage 1 V
EL1
0.5 V
Error amplifier block 2
Input current 2 I
B2
25 100 nA
Common mode input threshold voltage
V
IN
+ 0.72 0.75 0.78 V
High-level output voltage 2 V
EH2
V
REF
−
0.3
 V
Low-level output voltage 2 V
EL2
0.5 V
■ Electrical Characteristics at V
CC
= 12 V, T
a
= 25°C
Parameter Symbol Rating Unit
Supply voltage V
CC
35 V
Power dissipation
*
P
D
380 mW
Operating ambient temperature T
opr
−30 to +85 °C
Storage temperature T
stg
−40 to +125 °C
Note) 1. Do not apply external currents or voltages to any pins not specifically mentioned.
For circuit currents, '+' denotes current flowing into the IC, and '−' denotes current flowing out of the IC.
2
*
: When using the IC at T
a
of 25°C or more, the power dissipation should be decreased 3.8 mW per 1°C.
■ Absolute Maximum Ratings at T
a
= 25°C
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

AN8011S-E1V

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Panasonic
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IC REG CTRLR BUCK/BOOST 16SO
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