Details subject change without notice. ONE-CHANNEL STEP-UP CONTRO

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Details subject change without notice. ONE-CHANNEL STEP-UP CONTRO

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AAT1109
Details subject change without notice.
ONE-CHANNEL STEP-UP CONTROLLER
FEATURES
Under-Voltage Lockout (UVLO) Protection Totem Pole Output Output Short Circuit Protection Soft-Start Function Wide Operating Frequency 1MHz Shutdown Control Dissipation Current Typical 1.6mA Operation SOP-8 TSSOP-8 Package Available
GENERAL DESCRIPTION
AAT1109 one-channel step-up controller incorporating soft-start short circuit protection (SCP) function. This device consists on-chip voltage reference, error amplifier, pulse width modulation controller, under-voltage lockout protection, soft-start, short circuit protection circuits. Switching frequency 1MHz external resistor capacitor. Soft-start time implemented capacitor. Additionally, chip-enable feature also provided power down reduce current supply 10µA With minimal external components, AAT1109 offers simple economical solution.
CONFIGURATION
Advanced Analog Technology, Inc.
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AAT1109
DESCRIPTION
NAME DESCRIPTION Chip Enable Input PinInternal Pull Soft-Start Capacitor Connection Power Supply Totem Pole Type Output Ground Capacitor Resistor Connection Setting Oscillation Frequency Output Error Amplifier Inverting Input Error Amplifier
ABSOLUTE MAXIMUM RATINGS
CHARACTERISTICS
Supply Voltage Output Current Operating Free-Air Temperature Range Storage Temperature Range Power Dissipation
SYMBOL
VALUE
UNIT
Tstorage
RECOMMENDED OPERATING CONDITIONS
Supply Voltage Error Amplifier Input Voltage Oscillator (OSC) Capacitance Oscillator (OSC) Resistance Oscillator (OSC) Frequency Output Current Operating Free-Air Temperature
SYMBOL UNIT
10,000 10.0 1,000
Advanced Analog Technology, Inc.
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AAT1109
ELECTRICAL CHARACTERISTICS, 3.3V (UNLESS OTHERWISE SPECIFIED) (SEE NOTE OSCILLATOR
PARAMETER SYMBOL
Oscillation Frequency Frequency Variation with Temperature Frequency Input Stability
TEST CONDITION =270pF 4.2k
UNIT
2.6V 6.5V
UNDER-VOLTAGE PROTECTION
PARAMETER TEST CONDITION
Upper Threshold Voltage Lower Threshold Voltage Hysteresis (VUPH VUPL
VUPH VUPL VHYS
UNIT 2.12 2.47 2.85
1.96 2.28 0.19
2.63
Note Typical values parameters specified
SHORT CIRCUIT PROTECTION CONTROL
PARAMETER TEST CONDITION UNIT
Input Threshold Voltage Short-Circuit Detection Threshold Voltage Charging Current
VSCP
1.160 1.262 1.360 1.160 1.262 1.360
2.15 1.50 1.00
SOFT-START
PARAMETER
Charging Current Voltage Soft-Start Completion
TEST CONDITION VSCP
UNIT
2.15 1.50 1.00
1.160 1.262 1.360
SHUTDOWN CONTROL
PARAMETER TEST CONDITION UNIT
Shutdown Enable Voltage Shutdown Release Voltage
Advanced Analog Technology, Inc.
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AAT1109
ELECTRICAL CHARACTERISTICS, 3.3V (UNLESS OTHERWISE SPECIFIED (SEE NOTE IDLE PERIOD ADJUSTMENT SECTION
PARAMETER
Maximum Duty Cycle
Duty
TEST CONTION UNIT 270pF 4.2k 1.12V
(ERROR AMPLIFIER)
PARAMETER
Input Threshold Voltage
TEST CONDITION 0.7V
UNIT
1.249 1.262 1.275
0.05 0.20
Input Stability Variation with
Temperature Input Bias Current
Output Voltage Swing Output Sink Current Output Source Current Open-Loop Voltage Gain
6.5V
VOS+
VOS- 0.7V 0.7V
OUTPUT SECTION
PARAMETER TEST CONDITION UNIT
High-Level Output Voltage Low-Level Output Voltage Rise Time Fall Time
RISE
-30mA +30mA 1,000pF
FALL
1,000pF
OPERATING CURRENT
PARAMETER TEST CONDITION UNIT
Supply Current
DD-OFF DD-ON
Output "OFF" State 4.2k
Advanced Analog Technology, Inc.
Page
AAT1109
TIME CONSTANT SOFT-START SHORT CIRCUIT PROTECTION
Soft-Start AAT1109 operates soft-start mode. comparator monitors voltage soft-start setting
pin, which varies proportionally each other. This proportion relation controls duty activates soft-start operation. Soft-start mode, voltage VSCP input comparator, that duty determined VSCP When soft-started mode completed, setting voltage remains high circuit enters output short circuit protection wait state while VSCP remains low. Soft-Start Time (sec 0.84 CSCP (µF)
Short Circuit Protection response sudden drop switching regulator output, device locks error amplifier, pin, VOS+ starts feeding currents into capacitor achieve voltage value
approximately 0.84V this pin. This chain reaction protects circuit keeping output low. Users could reverse this process restarting device. Short Circuit Detection Time (sec 0.84 CSCP
Advanced Analog Technology, Inc.
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AAT1109
BLOCK DIAGRAM
IREF
VREF
ft-S
UVLO
VREF
rr-A
Advanced Analog Technology, Inc.
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AAT1109
APPLICATION CIRCUIT BOOST (STEP-UP)
Advanced Analog Technology, Inc.
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AAT1109
APPLICATION CIRCUIT (WITH CHARGE PUMP)
Vout
Advanced Analog Technology, Inc.
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AAT1109
BOOST STEP-UPTIMING CHART
Advanced Analog Technology, Inc.
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AAT1109
PACKAGE DIMENSION
8-PIN
SYMBOLS
DIMENSIONS MILLIMETERS 1.47 0.10 -0.33 0.19 4.80 5.80 3.80 -0.38 1.60 -1.45 0.41 0.20 4.85 6.00 3.90 1.27 0.71 -MAX 1.73 0.22 -0.51 0.25 4.95 6.20 4.00 -1.27 0.076
DEMINSIONS INCHES 0.058 0.004 -0.013 0.0075 0.189 0.228 0.150 -0.015 0.063 -0.057 0.016 0.008 0.191 0.236 0.154 0.050 0.028 -MAX 0.068 0.008 -0.020 0.0098 0.195 0.244 0.157 -0.050
Advanced Analog Technology, Inc.
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AAT1109
TAPE REEL
8-PIN
Advanced Analog Technology, Inc.
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AAT1109
TAPE REEL
8-PIN (CONT.)
NOTE: SPROCKET HOLE PITCH CUMULATIVE TOLERANCE MILLIMETERS. CAMBER EXCEED MILLIMETER MILLIMETERS MATERIAL: ANTI-STATIC BLACK ADVANTEK POLYSTYRENE. MEASURED PLANE MILLIMETERS ABOVE BOTTOM POCKET.
MEASURED FROM PLANE INSIDE BOTTOM POCKET SURFACE
CARRIER. POCKET POSITION RELATIVE SPROCKET HOLE MEASURED TRUE POSITION POCKET, POCKET HOLE.
Advanced Analog Technology, Inc.
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AAT1109
PACKAGE DIMENSION
TSSOP-8
Advanced Analog Technology, Inc.
Page
AAT1109
PACKAGE DIMENSION
TSSOP-8
SYMBOL
DIMENSION MILLIMETERS 1.05 1.10 1.20 0.05 0.10 0.15 -1.00 1.05 0.25 -0.30 -0.127 -2.90 3.05 3.10 6.20 6.40 6.60 4.30 4.40 4.50 -0.65 -0.50 0.60 0.70 -0.076
DIMENSION INCHES 0.041 0.043 0.047 0.002 0.004 0.006 -0.039 0.041 0.010 -0.012 -0.005 -0.114 0.120 0.122 0.244 0.252 0.260 0.169 0.173 0.177 -0.026 -0.020 0.024 0.028 -0.003
NOTE: CONTROLLING DIMENSION: MILLIMETERS. LEAD FRAME MATERIAL: OLIN C7025/EFTEC 64T. DIMENSION DOES INCLUDE MOLD FLASH, BURRS GATE BURRS. MOLD FLASH, BURRS GATE BURRS SHALL EXCEED 0.006" [0.15 MILLIMETERS] END. DIMENSION "E1" DOES INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL EXCEED 0.010" [0.25 MILLIMETERS] SIDE. DIMENSION DOES INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL 0.003" [0.08 MILLIMETERS] TOTAL EXCESS DIMENSION MAXIMUM MATERIAL CONDITION. DAMBAR CANNOT LOCATED LOWER RADIUS FOOT. MINIMUM SPACE BETWEEN PROTRUSION ADJACENT LEAD 0.0028" [0.07 MILLIMETERS]. TOLERANCE: 0.010" [0.25 MILLIMETERES] UNLESS OTHERWISE SPECIFIED. OTHERWISE DIMENSION FOLLOW ACCEPTABLE SPEC. REFERENCE DOCUMENT: JEDEC SPEC MO-153.
Advanced Analog Technology, Inc.
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AAT1109
TAPE REEL
TSSOP-8
Advanced Analog Technology, Inc.
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AAT1109
TAPE REEL
TSSOP-8 (CONT.)
X.XXX 0.0025 0.006 X.XXX 0.025 X.XX 0.10 0.25 UNIT: MILLIMETERS
NOTE: SPROCKET HOLE PITCH CUMULATIVE TOLERANCE MILLIMETERS. CAMBER EXCEED MILLIMETER MILLIMETERS. MATERIAL: ANTI-STATIC BLACK ADVANTEK POLYSTYRENE. MEASURED PLANE MILLIMETERS ABOVE BOTTOM POCKET. MEASURED FROM PLANE INSIDE BOTTOM POCKET SURFACE CARRIER. POCKET POSITION RELATIVE SPROCKET HOLE MEASURED TRUE POSITION POCKET, POCKET HOLE.
Advanced Analog Technology, Inc.
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AAT1109
PART MARKING
SOP8 MARKING
AAT1109 XXXXXX
SOP8 BACK MARKING
YYWW
PART MARKING
TSSOP8 MARKING
AAT1109 XXXXXX
TSSOP8 BACK MARKING
YYWW
Advanced Analog Technology, Inc.
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AAT1109
ORDERING INFORMATION
Advanced Analog Technology, Inc.
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Details subject change without notice. ONE-CHANNEL STEP-UP CONTRO

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