AAT3340
High Efficiency 1x/1.5x Charge PumpChargePump
TM
PRODUCT DATASHEET
4 3340.2008.07.1.1
www.analogictech.com
AAT3340
High Efficiency 1x/1.5x Charge PumpChargePump
TM
PRODUCT DATASHEET
4 3340.2008.07.1.1
www.analogictech.com
Electrical Characteristics
V
IN
= 3.6V; C
IN
= C
OUT
= 1F; C1= C2 = 1F; T
A
= -40°C to 85°C unless otherwise noted. Typical values are T
A
= 25°C.
Symbol Parameter Conditions Min Typ Max Units
Input Power Supply
V
IN
Input Voltage Range 2.7 5.5 V
I
Q
Operating Current
EN/SET = IN; 1x Mode, V
D1
= V
D2
= V
D3
; V
D4
= 1V 1.8 7.0
mA
EN/SET = IN; 1.5x Mode, I
D1
= I
D2
= I
D3
; I
D4
= Open 4.8 7.2
I
SHDN
V
IN
Shutdown Current EN/SET = GND 1 A
V
IN_(TH)
Charge Pump Mode Hysteresis
1x to 1.5x Transition at Any I
DX
; I
D1
= I
D2
= I
D3
;
I
D4
= 20mA
0.15 V
T
SD
Thermal Shutdown Threshold 140 °C
T
SD(HYS)
Thermal Shutdown Hysteresis 15 °C
LED Current Sink Outputs
I
(D-ACC)
LED Current Accuracy
EN/SET = DATA1 18 20 22
mA
EN/SET = DATA31 0.52 0.64 0.78
I
(D-Match)
LED Current Matching
1
I
MLED
= 20mA ±3 %
V
D_(TH)
Hysteresis for Mode Change I
MLED
= 20mA at 1.5x to 1x Mode 0.15 0.25 V
I
DMAX
Charge Pump Maximum
Output Current
120 mA
f
OSC
Clock Frequency 1 MHz
V
BL_(TH)
Charge Pump Mode Transition
Threshold
0.15 V
t
SS
Charge Pump Start Up Time 150 s
EN/SET and S
2
Cwire Control
V
ENH
EN/SET Input High Threshold
Voltage
1.4 V
V
ENL
EN/SET Input Low Threshold
Voltage
0.4 V
t
EN/SET(HI_MIN)
EN/SET Minimum High Time 50 ns
t
EN/SET(HI_MAX)
EN/SET Maximum High Time 75 s
t
EN/SET(LOW)
EN/SET Input Low Time 0.3 75 s
t
EN/SET(OFF)
EN/SET Input OFF Timeout 500 s
t
EN/SET(LAT)
EN/SET Input Latch Timeout
2
500 s
1.
LED current match is defined as 100 (I
DX
- I
AVG
)/I
AVG
.
2. If the part has been shut down, then the latch time would be 500s longer for soft start of charge pump.
