AAT2856 AAT, AAT2856 Datasheet - Page 5

• Manufacturer Part Number: AAT2856
• Description: High Current Charge Pump
• Manufacturer: AAT

Electrical Characteristics
V
values are T
1. The AAT2856 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured
2. Current matching is defined as the deviation of any sink current from the average of all active channels.
2856.2007.06.1.0
Charge Pump Section
BL1-BL6 Backlight LED Outputs
ENS Logic Control
t
t
t
t
IN
ENS(HI_MIN)
ENS(HI_MAX)
ENS(HI _ MAX)
Symbol
ENS(HI _ MIN)
t
V
by design, characterization, and correlation with statistical process controls.
t
I
T
I
t
V
ENS(LOW)
V
ENS(OFF)
BL_(MAX)
V
IN(SHDN)
ENS(LAT)
ΔI
SD(HYS)
IN(TH _ H)
= 3.6V; C
I
BL_(TH)
I
f
ENS(H)
I
ENS(L)
T
V
IN(Q)
OSC
OUT
ENS
(BL _ )
SD
IN
, ENS Serial Interface Minimum
, ENS Serial Interface Maximum
A
IN Operating Voltage Range
IN Operating Current
IN Shutdown Current
Over-Temperature Shutdown
Threshold
Over-Temperature Shutdown
Hysteresis
OUT Maximum Output Current
Charge Pump Mode Hysteresis
Charge Pump Oscillator
Frequency
BL1-BL6 Maximum Current
BL1-BL6 Current Matching
BL1-BL6 Charge Pump Mode
Transition Threshold
ENS Input Low Threshold
ENS Input High Threshold
ENS Input Leakage Current
ENS Serial Interface Low Time
High Time
High Time
ENS Off Timeout
ENS Serial Interface Latch
Timeout
IN
Description
= 25°C.
= 4.7µF; C
OUT
= 2.2µF; C
2
1, 2
1
= C
Conditions
1X Mode, 3.0V ≤ V
No Load; ENL = AGND, ENS = IN
1.5X Mode, 3.0V ≤ V
No Load; ENL = AGND, ENS = IN
2X Mode, 3.0V ≤ V
No Load; ENL = AGND, ENS = IN
ENA = ENB = ENS = AGND
Address 0, Data 1
T
Address 0, Data 1; V
Address 12, Data 2; V
Address 0, Data 1; V
V
V
V
A
ENS
IN
IN
2
= 25°C
≥ 3.3V
≥ 3.3V
= 1µF; T
= V
IN
= 5V
Dual LDO for BacklightApplications
A
= -40°C to +85°C, unless otherwise noted. Typical
High Current Charge Pump with
IN
IN
IN
IN
IN
≤ 5.5V, Active,
≤ 5.5V, Active,
IN
≤ 5.5V, Active,
- V
- V
- V
F
F
F
= 1.5V
= 1.5V
= 1.5V
Min
-1.0
2.7
1.4
0.3
18
Typ
140
200
500
150
15
20
30
50
2
AAT2856
Max Units
500
500
5.5
1.0
1.0
0.4
1.0
22
75
75
1
4
5
MHz
mA
mA
mV
mA
mV
µA
µA
°C
°C
µs
ns
µs
µs
µs
%
V
V
V
5