Advanced Analog Technology, Inc.
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 Current：1.6mA
Dead-Time Control：0 % to 100%
Wide Operating Frequency：
10kHz to 800kHz
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, dead–time 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.
V
DD
Range
：
4.0V to 14.0V
PIN CONFIGURATION
TO V W
P IE
C
t
R
t
N
E1
IE1
O
E1
D 1
TC
O T1
U
GD
N
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
EF
R
SC
P
N
E2
IE2
O
E2
D 2
TC
O T2
U
V
D
D
SO
P-16PA K G
CAE
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Page 1 of 16
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Advanced Analog Technology, Inc.
AAT1341
PIN DESCRIPTION
PIN NO NAME
C
t
1
I/O
DESCRIPTION
I
I
I
I
I
I
O
External Timing Capacitance
External Timing Resistance
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
R
t
NE1
IE1
OE1
DTC1
OUT1
GND
V
DD
OUT2
DTC2
OE2
IE2
NE2
SCP
V
REF
Noninverting Input of Error Amplifier 1
Inverting Input of Error Amplifier 1
Output of Error Amplifier 1
Output 1 Dead-Time / Soft-Start Setting
Output 1
Ground
I Power Supply
O Output 2
I Output 2 Dead-Time / Soft-Start Setting
I Output of Error Amplifier 2
I Inverting Input of Error Amplifier 2
I Noninverting Input of Error Amplifier 2
I Timer Latch Setting
O Reference Voltage (2.5V) Output
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Page 2 of 16
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Advanced Analog Technology, Inc.
AAT1341
ABSOLUTE MAXIMUM RATINGS
CHARACTERISTICS
SYMBOL
V
DD
V
I
V
O
VALUE
14.0
V
DD
UNIT
V
V
Supply Voltage
Input Voltage (
IE
−
, DTC)
Output Voltage
Output Current
Operating Free-Air Temperature Range
Storage Temperature Range
Power Dissipation
V
DD
+0.3
120
−
20
to
+
85
−
45
to
+
125
V
mA
o
o
I
O
T
C
T
storage
C
C
P
d
500
mW
RECOMMENDED OPERATING CONDITION
CHARACTERISTICS
Supply Voltage, V
DD
Input Voltage, IE1, IE2
SYMBOL
V
DD
V
cm
MIN
4.0
MAX
14.0
UNIT
V
0.5
0
100
5.1
10
-
−
20
1.6
V
DD
15,000
50.0
800
100
85
V
V
pF
k
Ω
Output Voltage
Oscillation (OSC) Capacitance
Oscillation (OSC) Resistance
Oscillation (OSC) Frequency
Output Current, I
OUT1
, I
OUT 2
Operating Free-Air Temperature
V
O
C
OSC
R
OSC
f
OSC
I
O
T
C
kHz
mA
o
C
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Page 3 of 16
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Advanced Analog Technology, Inc.
AAT1341
ELECTRICAL CHARACTERISTICS,
V
DD
= 6.0V (UNLESS OTHERWISE
SPECIFIED) (SEE NOTE 1)
OSCILLATOR
PARAMETER
TEST CONDITION
C
OSC
= 220pF,
R
OSC
= 10k
Ω
MIN
TYP MAX UNIT
Frequency
f
OSC
320
400
480
kHz
Frequency Changes with
V
DD
f
∆
V
V
DD
= 4.0V to 14.0V,
T
C
= 25
o
C
C
OSC
= 220pF,
R
OSC
=10
k
Ω
-
1
-
%
UNDER VOLTAGE PROTECTION
PARAMETER
Upper Threshold Voltage
V
UPH
TEST CONDITION
T
C
= 25
o
C
MIN TYP MAX UNIT
-
-
-
2.90
2.53
0.37
-
-
-
V
V
V
Lower Threshold Voltage
Hysteresis ( V
UPH
– V
UPL
)
V
UPL
V
HYS
T
C
= 25
o
C
T
C
= 25
o
C
SHORT CIRCUIT PROTECTION CONTROL
PARAMETER
TEST CONDITION
MIN
TYP MAX UNIT
Input Threshold Voltage
Short-Circuit Detect
Threshold Voltage
SCP Terminal Source
Current
Stand-by Voltage
Latch Voltage
V
r1
V
r 2
I
SCP
V
STB
V
LT
CH1, CH2
0.90
1.48
−
3 .5
1.05
1.64
−
2 .5
1.20
1.80
−
1 .5
V
V
µ
A
-
-
50
30
100
100
mV
mV
Note1: Typical values of all parameters are specified at
T
C =25
o
C.
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