LTC3226
TA = 25°C, unless otherwise noted.
Ideal Diode Gate Current
TYPICAL PERFORMANCE CHARACTERISTICS
Leakage Balancer Source and
Sink Capability
VMID Shunt Regulator Voltage
vs Current and Temperature
vs (VIN-VOUT
)
2.70
12
10
8
5
4
V
= 3.3V, V
= 5V
ONLY LEAKAGE
BALANCER
ACTIVE
FAST
OFF
LINEAR
REGION
IN
CPO
VMID SHUNT REG OFF
2.65
2.60
3
VMID
SOURCING
CURRENT
6
2
SHUNT
REGULATOR
ACTIVE
4
1
90°C
25°C
–45°C
2
0
2.55
2.50
FAST
ON
0
–1
–2
–3
–4
–5
FORWARD
VOLTAGE
V
V
= 3.3V
IN
–2
–4
–6
–8
= 5V
CPO
VMID
90°C
2.45
2.40
SINKING
25°C
CURRENT
–45°C
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
0.1
1
10
100
1000
–100
–50
0
50
100
VMID CURRENT (mA)
VMID VOLTAGE (V)
V
– V
(mV)
OUT
IN
3226 G11
3226 G10
3226 G12
Charge Profile When Top
Charge Profile When Top
Capacitor = Bottom Capacitor
Capacitor > Bottom Capacitor
6
5
6
5
CPO
CPO
4
4
V
V
IN
IN
3
3
V
MID
V
MID
2
2
V
CLAMPED
MID
2x
MODE
1
1
(SHUNT ACTIVE)
1x
MODE
1x
2x
R
= 33.2k, C = 1.2F
SC
PROG
0
0
MODE MODE
R
SC
= 33.2k
PROG
EXTRA 1.5F BETWEEN CPO
AND V
C
= 1.2F
MID
–1
–1
3226 G14
3226 G13
TIME (5 SECONDS/DIV)
TIME (5 SECONDS/DIV)
Charge Profile When Top
Capacitor < Bottom Capacitor
Normal-to-Back-Up Mode
Switching Transient Waveform
6
4
3
V
OUT
5
4
CPO
V
IN
V
IN
3
V
2
1
MID
2
TOP CAP
PFO
CLAMPED
= 33.2k,
(1V/DIV)
1
R
C
PROG
SC
C
C
= 1.2F
SC
= 1.2F, EXTRA
2x
1x
MODE
0
= 47ꢀF
= 2A
OUT
LOAD
1.5F BETWEEN
AND GND
MODE
I
V
MID
–1
0
0
3226 G15
TIME (5 SECONDS/DIV)
100
200
300
400
500
TIME (ꢀs)
3226 G16
3226fa
6
Linear Systems [ Linear Systems ]
