(Notes 2, 3) ............................................ –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
*V
IN
has an internal 20V clamp
32 31 30 29 28 27 26 25
BAL 1
SCAP 2
V
IN2
3
UV3 4
UV2 5
UV1 6
UV0 7
AC1 8
9 10 11 12 13 14 15 16
V
OUT
SWB
BB_IN
SWA
V
IN
CAP
AC2
SW
33
GND
24 FLOAT0
23 FLOAT1
22 LBSEL
21 BAT_IN
20 BAT_OUT
19 IPK2
18 IPK1
17 IPK0
UH PACKAGE
32-LEAD (5mm
×
5mm) PLASTIC QFN
T
JMAX
= 125°C,
θ
JA
= 44°C/W
EXPOSED PAD (PIN 33) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LTC3331EUH#PBF
LTC3331IUH#PBF
TAPE AND REEL
LTC3331EUH#TRPBF
LTC3331IUH#TRPBF
PART MARKING*
3331
3331
PACKAGE DESCRIPTION
32-Lead (5mm
×
5mm) Plastic QFN
32-Lead (5mm
×
5mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
SHIP
V
IN3
2
3331fc
For more information
www.linear.com/LTC3331
LTC3331
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= 5V, BAT_IN = BAT_OUT = BB_IN = 3.6V,
SHIP = OV, SCAP = 0V unless otherwise specified.
SYMBOL
V
IN
V
BB_IN
I
VIN
PARAMETER
Buck Input Voltage Range
Buck-Boost Input Voltage Range
V
IN
Quiescent Current
V
IN
Input in UVLO
V
IN
Input in UVLO
Buck Enabled, Sleeping
Buck Enabled, Sleeping
Buck Enabled, Not Sleeping
(Note 7)
V
IN
= 2.5V, V
BB_IN
= 0V
V
IN
= 16V, V
BB_IN
= 0V
V
IN
= 4V, V
BB_IN
= 0V
V
IN
= 18V, V
BB_IN
= 0V
V
IN
= 5V, V
BB_IN
= 0V, I
SW
= 0A (Note 4)
CONDITIONS
l
l
ELECTRICAL CHARACTERISTICS
MIN
1.8
TYP
MAX
19
5.5
UNITS
V
V
nA
nA
nA
nA
µA
nA
nA
µA
nA
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
mA
mV
mV
nA
V
450
800
1300
1800
150
200
950
200
100
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
700
1400
2000
2700
225
300
1500
300
150
3.09
4.12
5.15
6.18
7.21
8.24
9.27
10.30
11.33
12.36
13.39
14.42
15.45
16.48
17.51
18.54
21.0
900
1750
20
I
BB_IN
BB_IN Quiescent Current (Note 6)
BB_IN Input with V
IN
Active
V
BB_IN
= 3.6V, V
IN
= 5V
Buck-Boost Enabled, Sleeping
V
BB_IN
= 3.6V, V
IN
= 0V
Buck-Boost Enabled, Not Sleeping V
BB_IN
= 3.6V, V
IN
= 0V, I
SWA
= I
SWB
= 0A (Note 4)
V
OUT
Leakage Current
5V Output Selected, Sleeping
2.91
3.88
4.85
5.82
6.79
7.76
8.73
9.70
10.67
11.64
12.61
13.58
14.55
15.52
16.49
17.46
19.0
25
I
BRIDGE
= 10µA
I
BRIDGE
= 50mA
V
REVERSE
= 18V
I
REVERSE
= 1µA
V
SHUNT
700
1350
V
IN
Undervoltage Lockout Thresholds 3V Level Selected
(Rising or Falling)
4V Level Selected
5V Level Selected
6V Level Selected
7V Level Selected
8V Level Selected
9V Level Selected
10V Level Selected
11V Level Selected
12V Level Selected
13V Level Selected
14V Level Selected
15V Level Selected
16V Level Selected
17V Level Selected
18V Level Selected
I
VOUT
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.0
11.0
12.0
13.0
14.0
15.0
16.0
17.0
18.0
20.0
800
1550
V
SHUNT
I
SHUNT
V
IN
Shunt Regulator Voltage
Maximum Protective Shunt Current
Internal Bridge Rectifier Loss
(|V
AC1
– V
AC2
| – V
IN
)
Internal Bridge Rectifier Reverse
Leakage Current
Internal Bridge Rectifier Reverse
Breakdown Voltage
I
VIN
= 1mA
30
3331fc
For more information
www.linear.com/LTC3331
3
LTC3331
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= 5V, BAT_IN = BAT_OUT = BB_IN = 3.6V,
SHIP = OV, SCAP = 0V unless otherwise specified.
SYMBOL
V
OUT
PARAMETER
Regulated Buck/Buck-Boost Output
Voltage
CONDITIONS
1.8V Output Selected
Sleep Threshold
Wake-Up Threshold
2.5V Output Selected
Sleep Threshold
Wake-Up Threshold
2.8V Output Selected
Sleep Threshold
Wake-Up Threshold
3.0V Output Selected
Sleep Threshold
Wake-Up Threshold
3.3V Output Selected
Sleep Threshold
Wake-Up Threshold
3.6V Output Selected
Sleep Threshold
Wake-Up Threshold
4.5V Output Selected
Sleep Threshold
Wake-Up Threshold
5.0V Output Selected
Sleep Threshold
Wake-Up Threshold
PGVOUT Falling Threshold
I
PEAK_BB
Buck-Boost Peak Switch Current
As a Percentage of V
OUT
Target (Note 5)
250mA Target Selected
150mA Target Selected
100mA Target Selected
50mA Target Selected
25mA Target Selected
15mA Target Selected
10mA Target Selected
5mA Target Selected
Available Buck-Boost Current
Buck-Boost PMOS Input and Output
Switch On-Resistance
I
PEAK_BB
= 250mA, V
OUT
= 3.3V
IPK[2:0] = 111
IPK[2:0] = 110
IPK[2:0] = 101
IPK[2:0] = 100
IPK[2:0] = 011
IPK[2:0] = 010
IPK[2:0] = 001
IPK[2:0] = 000
IPK2 = 1
IPK2 = 0
l
l
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l
l
l
l
l
l
l
l
l
l
l
l
l
l
ELECTRICAL CHARACTERISTICS
MIN
TYP
1.806
1.794
2.508
2.492
2.809
2.791
3.010
2.990
3.311
3.289
3.612
3.588
4.515
4.485
5.017
4.983
92
250
150
100
50
25
15
10
5
0.8
1.0
1.4
2.4
4.5
7.3
10.7
20.5
0.6
3.9
MAX
1.872
UNITS
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
%
mA
mA
mA
mA
mA
mA
mA
mA
mA
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
1.728
2.425
2.575
2.716
2.884
2.910
3.090
3.200
3.400
3.492
3.708
4.365
4.635
4.850
88
200
120
80
40
20
12
8
4
50
5.150
96
350
210
140
70
35
21
14
7
Buck-Boost NMOS Input and Output
Switch On-Resistance
4
3331fc
For more information
www.linear.com/LTC3331
LTC3331
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= 5V, BAT_IN = BAT_OUT = BB_IN = 3.6V,
SHIP = OV, SCAP = 0V unless otherwise specified.
SYMBOL
PARAMETER
PMOS Switch Leakage
NMOS Switch Leakage
Maximum Buck Duty Cycle
I
PEAK_BUCK
Buck Peak Switch Current
Available Buck Output Current
Buck PMOS Switch On-Resistance
Buck NMOS Switch On-Resistance
Maximum Battery Shunt Current
I
BAT_IN
V
FLOAT
Battery Disconnect Leakage Current
Shunt Charger Float Voltage
(BAT_OUT Voltage)
Battery Disconnected
SHIP Mode Engaged
FLOAT[1:0] = 00, I
BB_IN
= 1mA
FLOAT[1:0] = 01, I
BB_IN
= 1mA
FLOAT[1:0] = 10, I
BB_IN
= 1mA
FLOAT[1:0] = 11, I
BB_IN
= 1mA
FLOAT[1:0] = 00, I
BB_IN
= 1mA
FLOAT[1:0] = 01, I
BB_IN
= 1mA
FLOAT[1:0] = 10, I
BB_IN
= 1mA
FLOAT[1:0] = 11, I
BB_IN
= 1mA
V
LBD
Low Battery Disconnect Threshold,
BAT_IN Voltage (Falling)
LBSEL = 0, FLOAT[1:0] = 00, I
BAT_IN
= –1mA
LBSEL = 1, FLOAT[1:0] = 00, I
BAT_IN
= –1mA
LBSEL = 0, FLOAT[1:0] = 01, 10, 11, I
BAT_IN
= –1mA
LBSEL = 1, FLOAT[1:0] = 01, 10, 11, I
BAT_IN
= –1mA
LBSEL = 0, FLOAT[1:0] = 00, I
BAT_IN
= –1mA
LBSEL = 1, FLOAT[1:0] = 00, I
BAT_IN
= –1mA
LBSEL = 0, FLOAT[1:0] = 01, 10, 11, I
BAT_IN
= –1mA
LBSEL = 1, FLOAT[1:0] = 01, 10, 11, I
BAT_IN
= –1mA
LBSEL = 0, FLOAT[1:0] = 00
LBSEL = 1, FLOAT[1:0] = 00
LBSEL = 0, FLOAT[1:0] = 01, 10, 11
LBSEL = 1, FLOAT[1:0] = 01, 10, 11
BAT_IN = 3.3V, I
BAT_IN
= 10mA
Current Out of CHARGE Pin
2mA Out of CHARGE Pin
l
l
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l
l
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l
l
l
l
ELECTRICAL CHARACTERISTICS
CONDITIONS
Buck/Buck-Boost Regulators
Buck/Buck-Boost Regulators
Buck/Buck-Boost Regulators
l
MIN
–20
–20
100
200
100
TYP
MAX
20
20
UNITS
nA
nA
%
mA
mA
Ω
Ω
mA
250
1.4
1.2
500
10
–10
–10
3.415
3.960
4.059
4.158
3.381
3.920
4.018
4.116
1.98
2.43
2.62
3.10
2.26
2.74
2.91
3.39
0
0
3.45
4.0
4.1
4.2
3.45
4.0
4.1
4.2
2.04
2.51
2.70
3.20
2.35
2.85
3.03
3.53
3.02
3.52
3.70
4.20
5
1
2
60
2.5
150
10
10
5.5
225
10
10
3.485
4.040
4.141
4.242
3.519
4.080
4.182
4.284
2.10
2.59
2.78
3.30
2.44
2.96
3.15
3.67
nA
nA
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
Ω
mA
mA
Ω
V
nA
mA
mA
V
LBC_BAT_IN
Low Battery Connect Threshold,
BAT_IN Voltage (Rising)
V
LBC_BAT_
OUT
Low Battery Connect Threshold,
BAT_OUT Voltage (Rising)
Battery Disconnect PMOS
On-Resistance
Charge Pin Current
CHARGE Pin Voltage PMOS
On-Resistance
V
SCAP
I
SCAP
Supercapacitor Balancer Input Range
Supercapacitor Balancer Quiescent
Current
Supercapacitor Balancer Source
Current
SCAP = 5.0V
SCAP = 5.0V, BAL = 2.4V
Supercapacitor Balancer Sink Current SCAP = 5.0V, BAL = 2.6V
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