AAT AAT1343 2-channel switching regulator Datasheet

Advanced Analog Technology, Inc.
AAT1343
Details are subject to change without notice
2-CHANNEL SWITCHING REGULATOR
FEATURES
GENERAL DESCRIPTION
z
Complete PWM Power Control Circuitry
z
Precision Reference:2.5V ± 1% (25 oC)
z
Under-Voltage Lockout (UVLO) Protection
z
Open Drain Output
z
Output Short Circuit Protection
z
Low Dissipation Current:1.6mA
z
Dead-Time Control:0 % to 100%
z
Wide Operating Frequency:
The AAT1343 provides an integrated two-channel
pulse-width-modulation (PWM) solution for the
power supply of DC-DC system; this device offers
the systems engineer 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 for these
two channels.
Both channels of AAT1343 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 channel 1
(CH1) and channel 2 (CH2) individually, and
dead-time control inputs can be used to control on /
off operation.
With a minimal number of external components, the
AAT1343 offers a simple and cost effective
solution.
10kHz to 800kHz
z
VDD Range:4.0V to 14.0V
PIN CONFIGURATION
TOP VIEW
Ct
1
16
VREF
Rt
2
15
SCP
NE1
3
14
NE2
IE1
4
13
IE2
OE1
5
12
OE2
DTC1
6
11
DTC2
OUT1
7
10
OUT2
GND
8
9
VDD
TSSOP-16 PACKAGE
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AAT1343
PIN DESCRIPTION
PIN NO.
1
NAME
Ct
I/O
DESCRIPTION
I External Timing Capacitor
2
Rt
I
3
4
5
6
7
8
9
10
11
12
13
14
15
16
NE1
IE1
OE1
DTC1
OUT1
GND
VDD
OUT2
DTC2
OE2
IE2
NE2
SCP
VREF
I
I
I
I
O
External Timing Resistor
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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AAT1343
ABSOLUTE MAXIMUM RATINGS
CHARACTERISTICS
VALUE
14.0
VDD
UNIT
V
V
Output Voltage
SYMBOL
VDD
VI
VO
VDD +0.3
V
Output Current
IO
120
mA
Operating Free-Air Temperature Range
TC
− 20 to + 85
o
Tstorage
− 45 to + 125
o
Pd
500
Supply Voltage
Input Voltage ( IE − , DTC)
Storage Temperature Range
Power Dissipation
C
C
mW
RECOMMENDED OPERATING CONDITIONS
CHARACTERISTICS
Supply Voltage, VDD
SYMBOL
VDD
Vcm
MIN
4.0
MAX
14.0
UNIT
V
0.5
1.6
V
VO
0
VDD
V
Oscillation (OSC) Capacitance
C OSC
100
15,000
pF
Oscillation (OSC) Resistance
R OSC
5.1
50.0
kΩ
Oscillation (OSC) Frequency
Output Current, I OUT1 , I OUT 2
f OSC
10
800
kHz
IO
-
100
mA
TC
− 20
85
Input Voltage at IE1 and IE2
Output Voltage
Operating Free-Air Temperature
o
C
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AAT1343
ELECTRICAL CHARACTERISTICS, VDD = 6.0V (UNLESS OTHERWISE
SPECIFIED) (SEE NOTE 1)
OSCILLATOR
PARAMETER
Frequency
Frequency Changes
with VDD
SYMBOL
f OSC
f ∆V
UNDER VOLTAGE PROTECTION
PARAMETER
SYMBOL
Upper Threshold
VUPH
Voltage
Lower Threshold
VUPL
Voltage
Hysteresis
VHYS
( VUPH – VUPL )
TEST CONDITION
C OSC = 220pF,
R OSC = 10 kΩ
VDD = 4.0V to 14.0V,
TC = 25 oC,
C OSC = 220pF,
R OSC = 10 kΩ
TEST CONDITION
MIN
TYP MAX UNIT
320
400
480
kHz
-
1
-
%
MIN TYP MAX UNIT
TC = 25 oC
2.6
2.9
3.2
V
TC = 25 oC
2.23
2.53
2.83
V
TC = 25 oC
-
0.37
-
V
SHORT CIRCUIT PROTECTION CONTROL
PARAMETER
SYMBOL
TEST CONDITION
MIN
TYP MAX UNIT
0.95
1.05
1.15
V
Input Threshold
Voltage
Vr1
Short-Circuit
Detection Threshold
Voltage
Vr 2
1.48
1.64
1.80
V
SCP Terminal Source
Current
I SCP
− 3 .5
− 2 .5
− 1 .5
µA
Stand-by Voltage
Latch Voltage
VSTB
-
50
30
100
100
mV
mV
CH1, CH2
VLT
Note 1: Typical values of all parameters are specified at
TC =25 oC.
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AAT1343
ELECTRICAL CHARACTERISTICS, VDD = 6.0V (UNLESS OTHERWISE
SPECIFIED) (SEE NOTE 1) (CONT.)
REFERENCE VOLTAGE
PARAMETER
Reference Voltage
SYMBOL
VREF
Input Voltage
Regulation
VRI
Output Voltage
Regulation
VRO
EA (ERROR AMPLIFIER)
PARAMETER
SYMBOL
VIO
Input Offset Voltage
Input Bias Current
Input Voltage Range
Open-Loop Voltage
Gain
Output Voltage Swing
TEST CONDITION
MIN
TYP MAX UNIT
I REF = −1mA , TC = 25 oC 2.480 2.505 2.530
I REF = −1mA ,
VDD = 4.0V to 14.0V
I REF = −0.1mA to
− 3.0 mA
TEST CONDITION
CH1, CH2, Unity Gain
V
-
1
5
mV
-
1
10
mV
MIN
TYP MAX UNIT
-
-
6
mV
0.5
± 15
± 100
-
1.6
nA
V
A VO
70
85
-
dB
VOS+
2.3
2.5
-
VOS−
-
0.7
0.9
I IB
VIR
CH1, CH2
CH1, CH2
V
Output Sink Current
I OS+
OE=1.25V
3
20
-
Output Source Current
I OS−
OE=1.25V
− 75
− 45
-
mA
µA
60
80
-
dB
Common-Mode
Rejection Ratio
CMRR
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AAT1343
ELECTRICAL CHARACTERISTICS, VDD = 6.0V (UNLESS OTHERWISE
SPECIFIED) (SEE NOTE 1) (CONT.)
DEAD-TIME CONTROL & PWM
PARAMETER
SYMBOL
I IB
Input Bias Current
Input Threshold
Voltage (DTC)
Latch Input Voltage
Latch Mode Source
Current
OUTPUT STAGE
PARAMETER
Saturation Voltage
Leakage Current
TEST CONDITION
VDTC = 2.0V
MIN TYP MAX UNIT
µA
0.1
1.0
Vd 0
Duty = 0%, f OSC = 10kHz
1.87
Vd100
Duty = 100%, f OSC = 10kHz
1.38
1.48
1.58
VDTC
I DTC = 40µA
2.28
2.48
-
V
I DTC
DTC1, DTC2 = 0V
− 560 − 200
-
µA
SYMBOL
VSAT
I LEAK
OPERATING CURRENT
SYMBOL
PARAMETER
I DD−OFF
Supply Current
I DD−ON
1.97
V
TEST CONDITION
MIN
I O = 75mA(CH1, CH2) -
VO =14.0V
TEST CONDITION
2.07
-
MIN
TYP MAX UNIT
0.8
1.2
-
5
V
µA
TYP MAX UNIT
Output “OFF” State
-
1.3
1.8
mA
R OSC =10 kΩ
-
1.6
2.3
mA
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AAT1343
BLOCK DIAGRAM
OE1
NE1
IE1
OUT1
SCP
Comp
Err-Amp
PWM
GND
UVC
NE2
OUT2
IE2
OE2
Err-Amp
PWM
V REF
Ct
UVC
DTC1
OSC
Rt
V REF
UVC
UVC
DTC2
LATCH
UVLO
VDD
LATCH
VDD
SCP
V REF
SCP
VREF
V REF
UVC
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AAT1343
APPLICATION CIRCUIT
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AAT1343
TIMING CHART
1.97V
OE
DTC
1.05V
1.48V
PWM OUTPUT
OUTPUT
1.64V
SCP
tSCP
SCP Comp
2.53V
Lockout Free
V DD
Note:
t SCP ≅
C SCP Vr 2
I SCP
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AAT1343
PACKAGE DIMENSION
16-PIN TSSOP
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AAT1343
PACKAGE DIMENSION (CONT.)
SYMBOLS
DIMENSIONS IN MILLIMETERS
DEMINSIONS IN INCHES
MIN
TYP
MAX
MIN
TYP
MAX
A
1.05
1.10
1.20
0.041
0.043
0.047
A1
0.05
0.10
0.15
0.002
0.004
0.006
A2
------
1.00
1.05
------
0.039
0.041
b
0.20
0.25
0.28
0.008
0.010
0.011
C
------
0.127
------
------
0.005
------
D
4.900
5.075
5.100
0.1930
0.1998
0.2000
E
6.20
6.40
6.60
0.244
0.252
0.260
E1
4.30
4.40
4.50
0.170
0.173
0.177
e
------
0.65
------
------
0.026
------
L
0.50
0.60
0.70
0.020
0.024
0.028
y
------
------
0.076
------
------
0.003
θ
0
o
4
o
8
o
0
o
4
o
8o
NOTE:
1. CONTROLLING DIMENSION: MILLIMETERS
2. LEAD FRAME MATERIAL: OLIN C7025/EFTEC 64T
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 SHALL 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 MO-153.
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AAT1343
TAPE AND REEL
PACKING METHOD: 2,500PCS/REEL, 1 REEL/BOX
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AAT1343
TAPE AND REEL (CONT.)
NOTE:
1.
2.
3.
4.
5.
6.
10 SPROCKET HOLE PITCH CUMULATIVE TOLERANCE ± 0.2 MILLIMETERS.
CAMBER NOT TO EXCEED 1 MILLIMETER IN 100 MILLIMETERS.
MATERIAL: ANTI-STATIC BLACK ADVANTEK POLYSTYRENE.
A 0 AND B 0 MEASURED ON A PLANE 0.3 MILLIMETERS ABOVE THE BOTTOM OF THE POCKET.
K 0 MEASURED FROM A PLANE ON THE INSIDE BOTTOM OF THE POCKET TO THE TOP SURFACE OF
THE CARRIER.
POCKET POSITION RELATIVE TO SPROCKET HOLE MEASURED AS TRUE POSITION OF POCKET, NOT
POCKET HOLE.
PART MARKING
TSSOP16 TOP MARKING
AAT1343
XXXXXX
TSSOP16 BACK MARKING
YYWW
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AAT1343
ORDERING INFORMATION
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