Advanced Analog Technology, Inc.
Advanced Analog Technology, Inc
.
Page 1 of 16 V1.0
AAT1341
Details are subject to change without notice
2-CHANNEL SWITCHING REGULATOR
FEATURES
Complete PWM Power Control Circuitry
Under-Voltage Lockout (UVLO) Protection
Open Drain Output
Output Short Circuit Protection
Low Dissipation Current1.6mA
Dead-Time Control0 % to 100%
Wide Operating Frequency
10kHz to 800kHz
DD
V Range4.0V to 14.0V
PIN CONFIGURATION
SOP-16PACKAGE
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IE1
OE1
DTC1
GND
OUT1
NE2
SCP
IE2
OE2
DTC2
OUT2
TOP VIEW
NE1
V
DD
REF
V
t
C
t
R
GENERAL DESCRIPTION
The AAT1341 provides an integrated two-channel
pulse-width-modulation (PWM) solution for the
power supply of DC-DC system; this device offers
system engineers the flexibility to tailor-make the
power supply circuitry for specific applications.
Each channel contains its own error amplifier,
PWM comparator, deadtime control (DTC), and
output driver. The under-voltage protection,
oscillator, short circuit protection and voltage
reference circuit are the common features of the two
channels.
Both channels of AAT1341 can be used for DC-DC
converter operations including step-up, step-down,
and inverting. Dead-time control can be set to
provide 0% to 100% dead-time through a resistive
divider network. Soft-start can be implemented by
paralleling the DTC resistor with a capacitor. Two
dead-time control inputs are assigned for CH1 and
CH2 individually, and dead-time control inputs can
be used to control on / off operation.
With a minimal number of external components, the
AAT1341 offers a simple and cost effective
solution.
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Page 2 of 16 V1.0
AAT1341
PIN DESCRIPTION
PIN NO NAME I/O
DESCRIPTION
1
t
C
I External Timing Capacitance
2
t
R
I External Timing Resistance
3 NE1
I
Noninverting Input of Error Amplifier 1
4
IE1
I Inverting Input of Error Amplifier 1
5
OE1
I Output of Error Amplifier 1
6
DTC1
I Output 1 Dead-Time / Soft-Start Setting
7 OUT1
O
Output
1
8 GND
Ground
9
DD
V
I Power Supply
10 OUT2
O
Output
2
11
DTC2
I Output 2 Dead-Time / Soft-Start Setting
12
OE2
I Output of Error Amplifier 2
13
IE2
I Inverting Input of Error Amplifier 2
14 NE2 I
Noninverting Input of Error Amplifier 2
15
SCP
I Timer Latch Setting
16
REF
V
O Reference Voltage (2.5V) Output
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Page 3 of 16 V1.0
AAT1341
ABSOLUTE MAXIMUM RATINGS
CHARACTERISTICS SYMBOL
VALUE
UNIT
Supply Voltage
DD
V
14.0 V
Input Voltage (
-
IE
, DTC)
I
V
DD
V
V
Output Voltage
O
V
DD
V +0.3
V
Output Current
O
I
120 mA
Operating Free-Air Temperature Range
C
T
20
-
to
85
+
o
C
Storage Temperature Range
storage
T
45
-
to
125
+
o
C
Power Dissipation
d
P
500 mW
RECOMMENDED OPERATING CONDITION
CHARACTERISTICS SYMBOL
MIN
MAX
UNIT
Supply Voltage,
DD
V
DD
V
4.0 14.0 V
Input Voltage, IE1, IE2
cm
V
0.5 1.6 V
Output Voltage
O
V
0
DD
V
V
Oscillation (OSC) Capacitance
OSC
C
100 15,000 pF
Oscillation (OSC) Resistance
OSC
R
5.1 50.0
k
Oscillation (OSC) Frequency
OSC
f
10 800 kHz
Output Current,
1
OUT
I
,
2
OUT
I
O
I
- 100 mA
Operating Free-Air Temperature
C
T
20
-
85
o
C
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Page 4 of 16 V1.0
AAT1341
ELECTRICAL CHARACTERISTICS,
DD
V
= 6.0V (UNLESS OTHERWISE
SPECIFIED) (SEE NOTE 1)
OSCILLATOR
PARAMETER
TEST
CONDITION
MIN
TYP
MAX
UNIT
Frequency
OSC
f
OSC
C
= 220pF,
OSC
R
= 10k
320 400 480 kHz
Frequency Changes with
DD
V
V
f
DD
V = 4.0V to 14.0V,
C
T = 25
o
C
OSC
C
= 220pF,
OSC
R
=10
k
- 1 - %
UNDER VOLTAGE PROTECTION
PARAMETER
TEST
CONDITION
MIN TYP
MAX
UNIT
Upper Threshold Voltage
UPH
V
C
T = 25
o
C
- 2.90 - V
Lower Threshold Voltage
UPL
V
C
T = 25
o
C
- 2.53 - V
Hysteresis (
UPH
V
UPL
V
)
HYS
V
C
T = 25
o
C
- 0.37 - V
SHORT CIRCUIT PROTECTION CONTROL
PARAMETER
TEST
CONDITION
MIN
TYP
MAX
UNIT
Input Threshold Voltage
1
r
V
CH1, CH2
0.90
1.05 1.20
V
Short-Circuit Detect
Threshold Voltage
2
r
V
1.48 1.64 1.80 V
SCP Terminal Source
Current
SCP
I
5
.
3
-
5
.
2
-
5
.
1
-
A
Stand-by Voltage
V
STB
-
50 100 mV
Latch Voltage
V
LT
- 30 100 mV
Note1: Typical values of all parameters are specified at C
T
=25
o
C.
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Page 5 of 16 V1.0
AAT1341
ELECTRICAL CHARACTERTISTICS,
DD
V
= 6.0V (UNLESS OTHERWISE
SPECIFIED) (SEE NOTE 1) (CONT.)
REFERENCE VOLTAGE
PARAMTER SYMBOL
TEST
CONDITION
MIN
TYP
MAX UNIT
Reference Voltage
REF
V
mA
1
I
REF
-
=
,
C
T = 25
o
C
2.4 2.5 2.6 V
Input Voltage Regulation
RI
V
mA
1
I
REF
-
=
,
V
DD
= 4.0V to 14.0V
- 1 5
mV
Output Regulation
RO
V
mA
1
.
0
I
REF
-
=
to
0
.
3
-
mA
- 1 10
mV
EA (ERROR AMPLIFIER)
PARAMETER
SYMBOL
TEST CONDITION
MIN
TYP MAX UNIT
Input Offset Voltage
IO
V
CH1, CH2, Unity Gain
-
-
6
mV
Input Bias Current
IB
I
CH1, CH2
-
15 100 nA
Input Voltage Range
IR
V
CH1, CH2
0.5
-
1.6
V
Open-Loop Voltage
Gain
VO
A
70 85 - dB
+
OS
V
2.3
2.5
-
Output Voltage Swing
-
OS
V
-
0.7
0.9
V
Output Sink Current
+
OS
I
OE=1.25V 3
20
-
mA
Output Source Current
-
OS
I
OE=1.25V
75
-
45
-
-
A
Common-Mode
Rejection Ratio
CMRR
60 80 - dB
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Page 6 of 16 V1.0
AAT1341
ELECTRICAL CHARACTERISTICS,
DD
V
= 6.0V
(UNLESS OTHERWISE SPECIFIED) (SEE NOTE 1) (CONT.)
DEAD-TIME CONTROL & PWM
PARAMETER
SYMBOL
TEST CONDITION
MIN TYP MAX UNIT
Input Bias Current
IB
I
DTC
V
= 2.0V
- 0.1 1.0 A
0
d
V
Duty = 0%,
OSC
f
= 10kHz
1.79
1.97 2.15
Input Threshold
Voltage (DTC)
100
d
V
Duty = 100%,
OSC
f
= 10kHz 1.32
1.48 1.64
V
Latch Input Voltage
DTC
V
A
40
I
DTC
=
2.28
2.48 - V
Latch Mode Source
Current
DTC
I
DTC1, DTC2=0V
560
-
200
-
-
A
OUTPUT STAGE
PARAMETER
SYMBOL
TEST CONDITION
MIN
TYP MAX UNIT
Saturation Voltage
V
SAT
O
I = 75mACH1, CH2
- 0.8
1.2 V
Leakage Current
LEAK
I
O
V =14.0V
- -
5.0
A
OPERATING CURRENT
PARAMETER
TEST CONDITION
MIN
TYP MAX UNIT
OFF
DD
I
-
Output "OFF" State
-
1.3
1.8
mA
Supply Current
ON
DD
I
-
= k
10
R
OSC
- 1.6
2.3
mA
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Page 7 of 16 V1.0
AAT1341
BLOCK DIAGRAM
SCP
UVLO
OE1
NE1
IE1
NE2
IE2
OE2
DTC1
DTC2
SCP
UVC
LATCH
UVC
UVC
V
REF
V
REF
R
t
GND
C
t
LATCH
PWM
PWM
UVC
Err-Amp
Err-Amp
UVC
OSC
SCP
Comp
OUT1
OUT2
REF
V
DD
V
DD
V
V
REF
V
REF
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Page 8 of 16 V1.0
AAT1341
APPLICATION CIRCUIT
AAT1341
OUT1
OUT2
Q1
VN1
D1
C9
L1
R11
R17
R18
Q3
Q4
NE1
OE1
IE1
NE2
OE2
IE2
C
t
R
t
GND
SCP
DTC2
DTC1
R12
R13
VN1
R1
R2
R3
R4
R5
C1
VP2
R6
C2
R14
R15
C
t
R
t
C
SCP
R8
R10
C5
R9
R7
C4
Q2
L2
C8
D3
D4
C7
VP3
VP2
D2
C10
Optional Circuit:
Charge Pump Circuit
R16
Step Up
Output
Inverting
Output
DD
V
DD
V
DD
V
DD
V
DD
V
REF
V
REF
V
REF
V
REF
V
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Page 9 of 16 V1.0
AAT1341
TIMING CHART
Note:
SCP
2
r
SCP
SCP
I
V
C
t
1.64V
2.53V
LOCKOUT
FREE
1.97V
1.48V
t
SCP
1.05V
OE
DTC
PWM OUTPUT
OUTPUT
SCP
SCP Comp
DD
V
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Page 10 of 16 V1.0
AAT1341
PACKAGE DIMENSION
16-PIN SOP
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Page 11 of 16 V1.0
AAT1341
PACKAGE DIMENSION (CONT.)
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Page 12 of 16 V1.0
AAT1341
PACKAGE DIMENSION (CONT.)
DIMENSIONS IN MILLIMETERS DEMINSIONS IN INCHES
SYMBOLS
MIN TYP MAX MIN
TYP
MAX
A
1.47
1.60
1.73 0.058 0.063 0.068
A1 0.10
------ 0.25
0.004
------
0.010
A2 ------
1.45 ------
------
0.057
------
b
0.33
0.41
0.51 0.013 0.016 0.020
C 0.19
0.20
0.25
0.0075
0.0080
0.0098
D
9.80
9.91
10.01 0.386 0.390 0.394
E
5.79
5.99
6.20 0.228 0.236 0.244
E1
3.81
3.91
3.99 0.150 0.154 0.157
e ------
1.27
------
------
0.050
------
L
0.38
0.71
1.27 0.015 0.028 0.050
y
------ ------ 0.076 ------
-----
0.003
o
0
------
o
8
o
0
------
o
8
NOTE:
1.
CONTROLLING DIMENSION: INCH
2.
LEAD FRAME MATERIAL: COPPER 194
3.
DIMENSION "D" DOES NOT INCLUDE MOLD FLASH, TIE BAR BURRS AND GATE BURRS. MOLD FLASH, TIE
BAR BURRS AND GATE BURRS SHALL NOT EXCEED 0.006" [0.15 MILLIMETERS] PER END DIMENSION "E1" DOES
NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SAHLL NOT EXCEED 0.010" [0.25 MILLIMETERS] PER
SIDE.
4.
DIMENSION "b" DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE
0.003" [0.08 MILLIMETERS] TOTAL IN EXCESS OF THE "b" DIMENSION AT MAXIMUM MATERIAL CONDITION.
DAMBAR CANNOT BE LOCATED ON THE LOWER RADIUS OR THE FOOT. MINIMUM SPACE BETWEEN
PROTRUSION AND AN ADJACENT LEAD TO BE 0.0028" [0.07 MILLIMETERS].
5.
TOLERANCE:
0.010" [0.25 MILLIMETERS] UNLESS OTHERWISE SPECIFIED.
6.
OTHERWISE DIMENSION FOLLOW ACCEPTABLE SPEC.
7.
REFERENCE DOCUMENT: JEDEC SPEC MS-012
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Page 13 of 16 V1.0
AAT1341
TAPE AND REEL
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Page 14 of 16 V1.0
AAT1341
TAPE AND REEL (CONT.)
X.XXX X
0.0025
X.XXX
0.006
X.XX
0.025
X.X
0.10
X
0.25
UNIT: MILLIMETERS
NOTE:
1.
10 SPROCKET HOLE PITCH CUMULATIVE TOLERANCE
0.2.
2.
CAMBER NOT TO EXCEED 1 MILLIMETER IN 100 MILLIMETERS.
3.
MATERIAL: BLACK ADVANTEK POLYSTYRENE.
4.
0
A AND
0
B MEASURED ON A PLANE 0.3 MILLIMETERS ABOVE THE BOTTOM OF THE POCKET.
5.
0
K MEASURED FROM A PLANE ON THE INSIDE BOTTOM OF THE POCKET TO THE TOP SURFACE OF THE
CARRIER.
6.
POCKET POSITION RELATIVE TO SPROCKET HOLE MEASURED AS TRUE POSITION OF POCKET, NOT POCKET
HOLE.
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Page 15 of 16 V1.0
AAT1341
PART MARKING
SOP16 TOP MARKING
AAT1341
BXXXXX.X
LOT NO.
YYWW TAIWAN
DATE CODE
(0416 = 16
th
week of Year 2004)
NOTE: SOP16 HAS NO BACK MARKING.
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Page 16 of 16 V1.0
AAT1341
ORDERING INFORMATION
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