Voltage Regulators
AN8017SA
1.8-volt 2-channel step-up DC-DC converter control IC
I
Overview
The AN8017SA is a two-channel PWM DC-DC con-
verter control IC that features low-voltage operation.
This IC can obtain the step-up voltage with a small
number of external components.
The minimum operating voltage is as low as 1.8 V so
that it can operate with two dry batteries. In addition,
since it uses the 16-pin surface mounting type package
with 0.65 mm pitch, it is suitable for a miniaturized highly
efficient potable power supply.
5.00±0.20
16
9
(1.0)
Unit: mm
M
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4.40±0.20
6.40±0.30
0.15
–0.05
+0.10
0° to 10°
0.50±0.20
1
8
0.65
(0.225)
•
Wide operating supply voltage range (1.8 V to 14 V)
Seating plane
0.22
•
Incorporating a high precision reference voltage circuit
(allowance:
±
2%)
SSOP016-P-0225A
•
Control in a wide output frequency range is possible
(20 kHz to 1 MHz)
Note) The package of this product will be changed
•
Built-in wideband error amplifier
to lead-free type (SSOP016-P-0225E). See the
(single gain bandwidth: 10 MHz typical)
package dimensions section later of this
•
A built-in timer latch short-circuit protection circuit
datasheet.
(charge current: 1.1
µA
typical)
•
Incorporating an under-voltage lock-out circuit (U.V.L.O.)
(circuit operation-starting voltage: 1.67 V typical)
•
Dead-time is variable
•
Flatness of switching current can be obtained by staggering the turn-on timing of each channel
•
Built-in unlatch function
When DT1 pin is low level or DT2 pin is high level, independent turn-off is possible.
•
Incorporating an on/off control function
(active-high control input, standby mode current: 1
µA
maximum)
•
Parallel operation is possible
•
Totem pole output
• Output source-current:
−50
mA maximum
(
Constant current output with a less supply voltage fluctuation is possible
by connecting an external resistor to pin 6 and pin 11)
• Output sink-current:
+80
mA maximum
+0.10
–0.05
I
Applications
•
LCD displays, digital still cameras, and PDAs
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SDH00007CEB
I
Features
1.4 max.
(Overall height)
Publication date: November 2001
1
AN8017SA
I
Block Diagram
V
REF
OSC
DT1
V
CC
1
9
Off
FB1
15
4
On/off
control
1.19 V
Reference
voltage source
V
REF
16
V
REF
Triangular wave
oscillation
0.9 V
0.2 V
Unlatch1
PWM1
7
V
CC
6
RB1
M
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IN−1
3 Error amp.1
1.19 V
0.9 V
FB2
13
IN+2
14
Error
amp.2
S.C.P.
comp.
0.22 V
U.V.L.O.
H
L
Latch
R
Q
S
V
CC
V
REF
PWM2
1.19 V
0.9 V
0.9 V
V
REF
Unlatch2
5
Out1
11
RB2
I
Pin Descriptions
Pin No. Symbol
1
OSC
Description
Pin for connecting a oscillation timing
resistor and capacitor
2
S.C.P.
Pin for connecting the time constant set-
ting capacitor for short-circuit protection
Pl
3
IN−1
Inverting input pin to error amplifier
1 block
12
13
14
DT2
FB2
IN+2
4
5
6
FB1
DT1
RB1
Output pin of error amplifier 1 block
PWM1 block dead-time setting pin
Out1 block output source current
setting resistor connection pin
7
Out1
Out1 block push-pull type output pin
2
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DT2 12
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x. ma
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m ion
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.
10
8
Pin No. Symbol
8
9
GND
V
CC
Description
Grounding pin
10
11
Out2
RB2
Out2 block output source current
setting resistor connection pin
input pin
15
16
Off
V
REF
On/off control pin
Reference voltage output pin
SDH00007CEB
Out2
GND
Power supply voltage application pin
Out2 block push-pull type output pin
PWM2 block dead-time setting pin
Output pin of error amplifier 2 block
Error amplifier 2 block noninverting
AN8017SA
I
Absolute Maximum Ratings
Parameter
Supply voltage
Off terminal allowable application voltage
IN−1 terminal allowable application voltage
*2
IN+2 terminal allowable application voltage
*2
Supply current
Output source current
Output sink current
Power dissipation
*1
Symbol
V
CC
V
OFF
V
IN−1
V
IN+2
I
CC
I
SO(OUT)
I
SI(OUT)
P
D
T
opr
T
stg
Rating
15
15
6
6
−50
+80
135
Unit
V
V
V
V
mA
mA
mA
°C
°C
For the circuit currents, '+' denotes current flowing into the IC, and '−' denotes current flowing out of the IC.
2. Except for the power dissipation, operating ambient temperature and storage temperature, all ratings are for T
a
=
25°C.
3. *1: T
a
=
85
°C.
For the independent IC without a heat sink. Note that applications must observe the derating curve for the
relationship between the IC power consumption and the ambient temperature.
*2: V
IN−1
, V
IN+2
=
V
CC
when V
CC
<
6 V.
I
Recommended Operating Range
Parameter
Supply voltage
Off control terminal application voltage
Output source current
Output sink current
Timing resistance
Timing capacitance
Oscillation frequency
Short-circuit protection time constant
setting capacitance
Output current setting resistance
I
Electrical Characteristics at V
CC
=
2.4 V, C
REF
=
0.1
µF,
T
a
=
25°C
Parameter
Reference voltage block
Reference voltage
Input regulation with input fluctuation
Load regulation
U.V.L.O. block
Circuit operation start voltage
V
UON
SDH00007CEB
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Symbol
V
CC
Range
Unit
V
1.8 to 14
0 to 14
V
OFF
V
I
SO(OUT)
I
SI(OUT)
R
T
C
T
−40
(minimum)
70 (maximum)
1 to 51
mA
mA
kΩ
pF
100 to 10 000
20 to 1 000
f
OUT
kHz
pF
Ω
C
SCP
R
B
1 000 (minimum)
180 to 15 000
Symbol
Conditions
I
REF
= −
0.1 mA
V
CC
=
1.8 V to 14 V
I
REF
= −
0.1 mA to
−1
mA
Min
Typ
Max
V
REF
Line
Load
1.166
−20
1.19
15
−5
1.214
30
1.59
1.67
1.75
M
Di ain
sc te
on na
tin nc
ue e/
d
Operating ambient temperature
Storage temperature
−30
to
+85
−55
to
+150
Note) 1. Do not apply external currents or voltages to any pins not specifically mentioned.
mW
Unit
V
mV
mV
V
3
AN8017SA
I
Electrical Characteristics at V
CC
=
2.4 V, C
REF
=
0.1
µF,
T
a
=
25°C (continued)
Parameter
Error amplifier 1 block
Input threshold voltage 1
Input bias current 1
High-level output voltage 1
Low-level output voltage 1
Output source current 1
Output sink current 1
V
TH1
I
B1
V
EH1
V
EL1
I
SO(FB)1
I
SI(FB)1
1.16
0.83
−61
33
1.19
0.2
0.93
−47
47
1.22
0.8
1.03
0.2
−33
61
V
µA
V
V
µA
µA
Symbol
Conditions
Min
Typ
Max
Unit
M
Di ain
sc te
on na
tin nc
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d
Error amplifier 2 block
Input threshold voltage 2
Input bias current 2
V
TH2
I
B2
1.16
1.19
0.2
0.8
High-level output voltage 2
Low-level output voltage 2
Output source current 2
Output sink current 2
Oscillator block
V
EH2
V
EL2
0.83
−61
33
0.93
−47
47
0.2
I
SO(FB)2
I
SI(FB)2
−33
61
Output off threshold voltage
Output 1 block
V
TH(OSC)
0.8
0.9
1.0
Oscillation frequency 1
Output duty ratio 1
f
OUT1
Du
1
R
T
=
12 kΩ, C
T
=
330 pF
185
73
205
78
225
83
High-level output voltage 1
Low-level output voltage 1
Output source current 1
Output sink current 1
V
OH1
V
OL1
I
O
= −10
mA, R
B
=
820
Ω
I
O
=
10 mA, R
B
=
820
Ω
1.4
0.2
I
SO(OUT)1
V
O
=
0.7 V, R
B
=
820
Ω
I
SI(OUT)1
V
O
=
0.7 V, R
B
=
820
Ω
R
O1
−40
20
−30
−20
Pull-down resistance 1
Output 2 block
20
30
40
Oscillation frequency 2
Output duty ratio 2
f
OUT2
Du
2
V
OH2
V
OL2
R
T
=
12 kΩ, C
T
=
330 pF
185
72
205
77
225
82
High-level output voltage 2
Low-level output voltage 2
Output source current 2
Output sink current 2
Pull-down resistance 2
PWM1 block
Output full-off input threshold voltage 1
V
T0-1
Duty
=
0%
Duty
=
100%
V
DT1
=
0.5 V
0.65
−1.1
0.28
0.72
−
0.5
I
O
= −10
mA, R
B
=
820
Ω
I
O
=
10 mA, R
B
=
820
Ω
1.4
1.22
V
µA
V
V
Pl
Output full-on input threshold voltage 1 V
T100-1
Input current 1
I
DT1
4
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0.2
40
I
SO(OUT)2
V
O
=
0.7 V, R
B
=
820
Ω
I
SI(OUT)2
V
O
=
0.7 V, R
B
=
820
Ω
R
O2
−40
20
20
−30
30
−20
0.30
SDH00007CEB
1.03
µA
µA
V
kHz
%
V
V
mA
mA
kΩ
kHz
%
V
V
mA
mA
kΩ
V
V
µA
AN8017SA
I
Electrical Characteristics at V
CC
=
2.4 V, C
REF
=
0.1
µF,
T
a
=
25
°C
(continued)
Parameter
PWM2 block
Output full-off input threshold voltage 2
Output full-on input threshold voltage 2
Input current 2
Unlatch circuit 1 block
Input threshold voltage 1
Unlatch circuit 2 block
V
THUL1
0.15
0.20
0.25
V
V
T0-2
V
T100-2
I
DT2
Duty
=
0%
Duty
=
100%
V
DT2
=
0.2 V
0.65
−1.1
0.72
0.28
−
0.5
0.30
V
V
µA
Symbol
Conditions
Min
Typ
Max
Unit
M
Di ain
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on na
tin nc
ue e/
d
Input threshold voltage 2
V
THUL2
V
STBY
0.8
0.9
1.0
Short-circuit protection circuit block
Input standby voltage
60
120
1.0
Input threshold voltage 1
Input threshold voltage 2
Input latch voltage
Charge current
V
THPC1
V
THPC2
V
IN
0.8
0.9
0.17
0.22
60
120
I
CHG
V
SCP
=
0 V
−1.43
0.8
On/off control block
Input threshold voltage
Whole device
V
ON(TH)
1.0
1.3
Output off consumption current
I
CC(OFF)
I
CC(LA)
I
CC(SB)
R
B
=
820
Ω,
duty
=
0%
R
B
=
820
Ω
7.0
5.6
9.8
7.8
1
Latch mode consumption current
Standby current
•
Design reference data
Parameter
Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.
V
mV
V
Reference voltage block
V
REF
temperature characteristics
U.V.L.O. block
Reset voltage
Over-current protection drive current
Error amplifier 1/2 blocks
V
TH
temperature characteristics
Open-loop gain
Single gain bandwidth
Output 1/2 blocks
RB terminal voltage
Frequency supply voltage characteristics
Frequency temperature characteristics
V
B
f
dV
f
dT
−1
−3
0.36
+1
+3
V
%
%
V
THdT
A
V
f
BW
T
a
= −30°C
to
+85°C
−
0.3
57
10
+
0.3 mV/°C
dB
MHz
Pl
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on te
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-in in
de for
x. ma
ht t
m ion
l
.
0.27
−1.1 −
0.77
Symbol
Conditions
Min
−1
Typ
Max
+1
V
REFdT
I
OC
T
a
= −30°C
to
+85°C
−11
V
R
0.8
SDH00007CEB
V
mV
µA
V
mA
mA
µA
Unit
%
mA
V
5
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