LTC3226
ELECTRICAL CHARACTERISTICS
SYMBOL
V
IN
I
VIN(ST)
I
CPO(ST)
I
VOUT(ST)
I
CPO(BU)
I
VOUT(BU)
PARAMETER
Input Supply Range
V
IN
Quiescent Current in Normal Mode
CPO Quiescent Current in Normal Mode
V
OUT
Quiescent Current in Normal Mode
CPO Quiescent Current in Backup Mode
V
OUT
Quiescent Current in Backup Mode
V
PFI
> 1.2V, V
CPO_FB
> 1.2V, V
IN
< V
CPO
V
PFI
> 1.2V, V
CPO_FB
> 1.2V, V
IN
< V
CPO
V
OUT
= V
IN
, V
PFI
> 1.2V, V
CPO_FB
> 1.2V,
V
IN
< V
CPO
V
PFI
< 1.2V, V
LDO_FB
> 0.8V, V
CPO
> V
OUT
V
IN
= 0V, V
PFI
< 1.2V, V
LDO_FB
> 0.8V,
V
CPO
> V
OUT
The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 3). V
IN
= 3.3V, V
CPO
= 5V, V
OUT
= 3.3V, VMID = 1/2 V
CPO
unless otherwise noted.
CONDITIONS
l
MIN
2.5
TYP
10
20
5
24
3
MAX
5.5
UNITS
V
μA
μA
μA
μA
μA
Ideal Diode Controller
V
FWD(EDA)
V
RTO
External Ideal Diode Forward Voltage (V
IN
-V
OUT
) I
VOUT
= 2mA
Fast Turn-Off Voltage (V
IN
-V
OUT
)
Fast Turn-On Voltage (V
IN
-V
OUT
)
Charge Pump Supercapacitor Charger
V
CPO_FB
I
CPO_FB
f
OSC
R
OL
V
PROG
I
VIN(ILIM)
h
PROG
I
CHRG(1x)
I
CHRG(2x)
I
SC
V
MODE
CPO_FB Pin Threshold for Entering Sleep Mode
CPO_FB Pin Hysteresis for Exiting Sleep Mode
Charge Pump FB Pin Input Leakage
CLK Frequency
Effective Open-Loop Output Impedance (Note 4) V
CPO
= 4.5V, C
FLY
= 1μF
PROG Pin Servo Voltage
Input Current Limit
Ratio of V
IN
Input Current Limit to PROG Pin
Current
CPO Pin Charging Current (1x Mode)
CPO Pin Charging Current (2x Mode)
Short-Circuit Charge Current
V
IN
to CPO Voltage Differential for Switching
Mode from 1x to 2x
1x/2x Mode Comparator Hysteresis
V
CLAMP
V
STACK
VMID
Maximum Voltage Across Either Supercapacitor
After Charging
Maximum Supercapacitor Stack Voltage
VMID Output Voltage
VMID Current Sourcing Capability
VMID Current Sinking Capability
CPO_FB Pin Threshold Voltage (Rising) for
CAPGOOD
CPO_FB Pin Hysteresis for CAPGOOD
CAPGOOD Output Low Voltage
CAPGOOD High Impedance Leakage Current
I
SINK
= 5mA
V
CAPGOOD
= 5V
l
l
l
l
l
15
–45
45
1.18
–50
0.75
0.9
6
l
mV
mV
mV
1.24
50
1.05
1.02
V
mV
nA
MHz
Ω
V
mA
A/A
mA
mA
mA
mV
mV
2.75
5.5
V
V
V
mA
mA
1.13
V
mV
mV
1
μA
V
IN
Falling
V
OUT
Falling
1.21
20
V
CPO_FB
= 1.3V
V
CPO_FB
< 1.2V
R
PROG
= 33.3k, V
CPO
= 0V
R
PROG
= 33.3k, V
CPO
= 0V
V
IN
= 3.8V, R
PROG
= 33.3k, V
CPO
= 3V
R
PROG
= 33.3k
PROG Pin Grounded, V
CPO
= 0V
0.98
1.0
360
10,500
315
157.5
600
200
120
2.65
5.3
2.5
4.5
5.5
VMID < V
CPO
/2, V
CPO_FB
> 1.24V
VMID > V
CPO
/2, V
CPO_FB
> 1.24V
l
1.09
1.11
20
65
3226fa
3
LINEAR [ LINEAR INTEGRATED SYSTEMS ]
