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| AAT1189 Datasheet, PDF (4/19 Pages) Advanced Analogic Technologies – High Voltage Step-Down Regulator | |||
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SwitchRegTM
PRODUCT DATASHEET
AAT1189
High Voltage Step-Down Regulator
Electrical Characteristics1
VIN = 12V; TA = -40°C to 85°C, unless noted otherwise. Typical values are at TA = 25°C.
Symbol
VIN
VUVLO
VOUT
VFB
ÎVLINEREG/
ÎVIN
ÎVLOADREG/
ÎIIN
IQ
ISHDN
VOCP
ILX
DMAX
TON(MIN)
RDSON(H)
FOSC
FFOLDBACK
TSS
TSD
VEN(L)
VEN(H)
IEN
Description
Input Voltage
UVLO Threshold
Output Voltage Range
Output Voltage Accuracy
Feedback Pin Voltage
Line Regulation
Load Regulation
Quiescent Current
Shutdown Current
Over-Current Offset Voltage
LX Pin Leakage Current
Maximum Duty Cycle
Minimum On-Time
Hi Side On-Resistance
Oscillator Frequency
Short Circuit Foldback Frequency
Soft-Start Time
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Enable Threshold Low
Enable Threshold High
Input Low Current
Conditions
VIN Rising
VIN Hysteresis
VIN Falling
IOUT = 0A to 2.5A
VIN = 6V to 24V, VOUT = 3.3V, IOUT = 2.5A
VIN = 6V to 24V, VOUT = 5.0V, IOUT = 2.5A
VIN = 12V, VOUT = 3.3V, IOUT = 0A to 2.5A
VIN = 12V, VOUT = 5V, IOUT = 0A to 2.5A
VEN = High, No load
VEN = Low, VL = 0V
VEN = High, VIN = 6.0V to 24.0V, TA = 25°C
VIN = 24.0V, VEN = Low
VIN = 6.0 to 24.0V
VL = 4.5V
Current Limit Triggered
From Enable to Output Regulation
Min Typ
6.0
3.0
1.5
-2.5
0.591
300
0.600
0.028
0.17
0.064
0.08
0.6
80 100
-1.0
85
100
70
350 490
100
2.5
135
15
2.5
-1.0
Max
24.0
5.0
5.5
2.5
0.609
35.0
120
1.0
650
0.6
1.0
Units
V
V
mV
V
V
%
V
%/V
%/A
mA
μA
mV
μA
%
ns
mΩ
kHz
kHz
ms
°C
°C
V
V
μA
1. The AAT1189 is guaranteed to meet performance specifications over the â40°C to +85°C operating temperature range and is assured by design, characterization and correla-
tion with statistical process controls.
4
www.analogictech.com
1189.2008.06.1.0
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