AAT2847_08 Datasheet, PDF (5/20 Pages) Advanced Analogic Technologies – Four-Channel Backlight Driver with Dual LDOs

ChargePump^TM
PRODUCT DATASHEET
AAT2847
Four-Channel Backlight Driver with Dual LDOs
Electrical Characteristics¹
V_IN = 3.6V; C_IN = C_LDOA = C_LDOB = 2.2µF; C_OUT = 1µF; C1 = C2 = 1µF; T_A = 25°C, unless otherwise noted. Typical values
are at T_A = 25°C.
Symbol Description
LDOs: AAT2847-EE
I_IN
IN Operating Current
V_FBA, V_FBB Feedback Voltage
V_DO
∆V_OUT/
V_OUT*∆V_IN
Dropout Voltage
Line Regulation
PSRR
Power Supply Rejection Ratio
LDOs: AAT2847-QG
I_IN
IN Operating Current
LDOA
LDOA Voltage Tolerance
LDOB
LDOB Voltage Tolerance
V_DO
∆V_LDO[A/B]/
V_LDO[A/B]*∆V_IN
LDOA Dropout Voltage²
LDOA, LDOB Line Regulation
PSRR
LDOA, LDOB Power Supply
Rejection Ratio
LDOs: AAT2847-QI
I_IN
IN Operating Current
LDOA
LDOA Voltage Tolerance
LDOB
LDOB Voltage Tolerance
V_DO
∆V_LDO[A/B]/
V_LDO[A/B]*∆V_IN
PSRR
LDOA Dropout Voltage²
LDOA, LDOB Line Regulation
LDOA, LDOB Power Supply
Rejection Ratio
LDO Logic Control – All Options
V_IL(ENA),
V_IL(ENB)
ENA, ENB Input Logic Low
Threshold Voltage
V_IH(ENA),
V_IH(ENB)
I_EN[A/B]
ENA, ENB Input Logic High
Threshold Voltage
ENA, ENB Input Leakage
Conditions
V_ENA = V_ENB = V_IN, V_EN/SET = 0V, No Load
V_ENA = V_IN; V_ENB = 0V; V_EN/SET = 0V; No Load
I_LDO[A/B] = 1mA to 200mA
I_LDO[A/B] = 150mA
V_IN = (V_LDO[A/B] + 1V) to 5V
I_LDO[A/B] =10mA, 1kHz
V_ENA = V_ENB = V_IN, V_EN/SET = 0V, No Load
V_ENA = V_IN; V_ENB = 0V; V_EN/SET = 0V; No Load
I_LDOA = 1mA to 150mA
I_LDOB = 1mA to 150mA
I_LDOA = 150mA
V_IN = (LDOA + 1V) to 5V; V_IN = (LDOB + 1.2V) to 5V
I_LDO[A/B] =10mA, 1kHz
V_ENA = V_ENB = V_IN, V_EN/SET = 0V, No Load
V_ENA = V_IN; V_ENB = 0V; V_EN/SET = 0V; No Load
I_LDOA = 1mA to 150mA
I_LDOB = 1mA to 150mA
I_LDOA = 150mA
V_IN = (LDO[A/B] + 1V) to 5V
I_LDO[A/B] = 10mA, 1kHz
V_EN[A/B] = V_IN = 5V
Min Typ Max
1.17
80
60
1.2
150
0.09
50
150
112
1.23
300
80 150
60 112
2.716 2.8 2.884
1.455 1.5 1.545
150 300
0.09
50
80 150
60 112
2.716 2.8 2.884
1.746 1.8 1.854
150 300
0.09
50
0.4
1.4
-1
1
Units
µA
V
mV
%/V
dB
µA
V
V
mV
%/V
dB
µA
V
V
mV
%/V
dB
V
V
µA
1. The AAT2847 is guaranteed to meet performance specifications over the –40˚C to +85°C operating temperature range is assured by design, characterization and correlation
with statistical process controls.
2. VDO is defined as VIN - LDOA when LDOA is 98% of nominal.
2847.2008.05.1.2
www.analogictech.com
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