View AAT1343_840830.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Advanced Analog Technology, Inc.
AAT1343
Details are subject to change without notice
2-CHANNEL SWITCHING REGULATOR
FEATURES
Complete PWM Power Control Circuitry Precision ReferenceG 2.5V 1% (25 oC) Under-Voltage Lockout (UVLO) Protection Open Drain Output Output Short Circuit Protection Low Dissipation CurrentG 1.6mA Dead-Time ControlG 0 % to 100% Wide Operating FrequencyG 10kHz to 800kHz
GENERAL DESCRIPTION
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.
VDD RangeG 4.0V to 14.0V
PIN CONFIGURATION
TOP VIEW
Ct Rt NE1 IE1 OE1 DTC1 OUT1 GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VREF SCP NE2 IE2 OE2 DTC2 OUT2 VDD
TSSOP-16 PACKAGE
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 1 of 14 V1.0
Advanced Analog Technology, Inc.
AAT1343
PIN DESCRIPTION
PIN NO. 1 NAME Ct I/O DESCRIPTION I External Timing Capacitor
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Rt NE1 IE1 OE1 DTC1 OUT1 GND VDD OUT2 DTC2 OE2 IE2 NE2 SCP VREF
I 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
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 2 of 14 V1.0
Advanced Analog Technology, Inc.
AAT1343
ABSOLUTE MAXIMUM RATINGS
CHARACTERISTICS SYMBOL VDD VI VO VALUE 14.0 VDD UNIT V V
Supply Voltage Input Voltage ( IE - , DTC) Output Voltage Output Current Operating Free-Air Temperature Range Storage Temperature Range Power Dissipation
VDD +0.3 120
- 20 to + 85 - 45 to + 125
V mA
o o
IO TC
Tstorage
C C
Pd
500
mW
RECOMMENDED OPERATING CONDITIONS
CHARACTERISTICS Supply Voltage, VDD SYMBOL VDD Vcm MIN 4.0 MAX 14.0 UNIT V
Input Voltage at IE1 and IE2 Output Voltage Oscillation (OSC) Capacitance Oscillation (OSC) Resistance Oscillation (OSC) Frequency Output Current, I OUT1 , I OUT 2 Operating Free-Air Temperature
0.5 0 100 5.1 10 - 20
1.6 VDD 15,000 50.0 800 100 85
V V pF
k
VO C OSC R OSC f OSC IO TC
kHz mA
o
C
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 3 of 14 V1.0
Advanced Analog Technology, Inc.
AAT1343
ELECTRICAL CHARACTERISTICS, VDD = 6.0V (UNLESS OTHERWISE SPECIFIED) (SEE NOTE 1)
OSCILLATOR PARAMETER
SYMBOL
Frequency
f OSC
TEST CONDITION C OSC = 220pF, R OSC = 10 k
MIN
TYP MAX UNIT
320
400
480
kHz
Frequency Changes with VDD
f V
VDD = 4.0V to 14.0V, TC = 25 oC, C OSC = 220pF, R OSC = 10 k
-
1
-
%
UNDER VOLTAGE PROTECTION PARAMETER SYMBOL Upper Threshold VUPH Voltage Lower Threshold VUPL Voltage Hysteresis VHYS ( VUPH - VUPL )
TEST CONDITION
MIN TYP MAX UNIT
TC = 25 oC TC = 25 oC TC = 25 oC
2.6 2.23 -
2.9 2.53 0.37
3.2 2.83 -
V V V
SHORT CIRCUIT PROTECTION CONTROL PARAMETER SYMBOL TEST CONDITION
MIN
TYP MAX UNIT
Input Threshold Voltage Short-Circuit Detection Threshold Voltage SCP Terminal Source Current Stand-by Voltage Latch Voltage
Vr1 Vr 2 I SCP VSTB VLT
CH1, CH2
0.95
1.05
1.15
V V
A
1.48
- 3 .5
1.64
- 2 .5
1.80
- 1 .5
TC =25 oC.
50 30
100 100
mV mV
Note 1: Typical values of all parameters are specified at
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 4 of 14 V1.0
Advanced Analog Technology, Inc.
AAT1343
ELECTRICAL CHARACTERISTICS, VDD = 6.0V (UNLESS OTHERWISE SPECIFIED) (SEE NOTE 1) (CONT.)
REFERENCE VOLTAGE PARAMETER
SYMBOL
TEST CONDITION
MIN
TYP MAX UNIT
Reference Voltage Input Voltage Regulation Output Voltage Regulation
VREF VRI VRO
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 1 1 5 10
V mV mV
EA (ERROR AMPLIFIER) PARAMETER SYMBOL VIO Input Offset Voltage
TEST CONDITION CH1, CH2, Unity Gain
MIN
TYP MAX UNIT
0.5 70 2.3 -
15
6
100
mV nA V dB V mA A dB
Input Bias Current Input Voltage Range Open-Loop Voltage Gain Output Voltage Swing Output Sink Current Output Source Current Common-Mode Rejection Ratio
I IB VIR A VO VOS+ VOS- I OS+ I OS- CMRR
CH1, CH2 CH1, CH2
85 2.5 0.7 20
- 45
1.6 0.9 -
OE=1.25V OE=1.25V
3
- 75
60
80
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 5 of 14 V1.0
Advanced Analog Technology, Inc.
AAT1343
ELECTRICAL CHARACTERISTICS, VDD = 6.0V (UNLESS OTHERWISE SPECIFIED) (SEE NOTE 1) (CONT.)
DEAD-TIME CONTROL & PWM PARAMETER SYMBOL I IB Input Bias Current TEST CONDITION VDTC = 2.0V MIN TYP MAX UNIT A 0.1 1.0
Input Threshold Voltage (DTC) Latch Input Voltage Latch Mode Source Current
OUTPUT STAGE PARAMETER
Vd 0 Vd100 VDTC I DTC
Duty = 0%, f OSC = 10kHz Duty = 100%, f OSC = 10kHz I DTC = 40A DTC1, DTC2 = 0V
1.87 1.38 2.28
1.97 1.48 2.48
2.07 V 1.58 V
A
- 560 - 200
Saturation Voltage Leakage Current
SYMBOL VSAT
TEST CONDITION I O = 75mA] CH1, CH2^
MIN -
TYP MAX UNIT
0.8 -
1.2 5
I LEAK
VO =14.0V
-
V A
OPERATING CURRENT SYMBOL PARAMETER I DD-OFF Supply Current I DD-ON
TEST CONDITION
MIN
TYP MAX UNIT
Output "OFF" State R OSC =10 k
-
1.3 1.6
1.8 2.3
mA mA
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 6 of 14 V1.0
Advanced Analog Technology, Inc.
AAT1343
BLOCK DIAGRAM
OE1 NE1 IE1
Err-Amp SCP Comp PWM
OUT1
GND
UVC
NE2 IE2 OE2
Err-Amp PWM VREF UVC
OUT2
Ct
DTC1 OSC
VREF UVC UVC
Rt
DTC2
LATCH
UVLO
VDD
LATCH
VDD
SCP SCP
UVC
VREF
VREF
VREF
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 7 of 14 V1.0
Advanced Analog Technology, Inc.
AAT1343
APPLICATION CIRCUIT
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 8 of 14 V1.0
Advanced Analog Technology, Inc.
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
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 9 of 14 V1.0
Advanced Analog Technology, Inc.
AAT1343
PACKAGE DIMENSION
16-PIN TSSOP
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 10 of 14 V1.0
Advanced Analog Technology, Inc.
AAT1343
PACKAGE DIMENSION (CONT.)
SYMBOLS A A1 A2 b C D E E1 e L y
DIMENSIONS IN MILLIMETERS MIN 1.05 0.05 -----0.20 -----4.900 6.20 4.30 -----0.50 -----TYP 1.10 0.10 1.00 0.25 0.127 5.075 6.40 4.40 0.65 0.60 -----MAX 1.20 0.15 1.05 0.28 -----5.100 6.60 4.50 -----0.70 0.076
DEMINSIONS IN INCHES MIN 0.041 0.002 -----0.008 -----0.1930 0.244 0.170 -----0.020 -----TYP 0.043 0.004 0.039 0.010 0.005 0.1998 0.252 0.173 0.026 0.024 -----MAX 0.047 0.006 0.041 0.011 -----0.2000 0.260 0.177 -----0.028 0.003
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.
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 11 of 14 V1.0
Advanced Analog Technology, Inc.
AAT1343
TAPE AND REEL
PACKING METHOD: 2,500PCS/REEL, 1 REEL/BOX
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 12 of 14 V1.0
Advanced Analog Technology, Inc.
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
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 13 of 14 V1.0
Advanced Analog Technology, Inc.
AAT1343
ORDERING INFORMATION
- xAEWAniN/|-1/2q - - Advanced Analog Technology, Inc. -
Page 14 of 14 V1.0

▲Up To Search▲

Price & Availability of AAT1343

	To Download AAT1343 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .