CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are
at the specified temperature and are pulsed tests, therefore: T
J
= T
C
= T
A
Electrical Specifications
PARAMETER
V
IN
= 3.3V, V
BOOST
= 12V,
R
OSC
= 100kΩ,
T
A
= 25°C Unless Otherwise Specified.
CONDITIONS
MIN
TYP
MAX
UNIT
DESCRIPTION
DC-DC BOOST CONVERTER
IQ1_B
IQ2_B
V(FBB)
V
REF
V
ROSC
I(FBB)
V
DDB
D
MAX
I(LX)
MAX
R
DS-ON
I
LEAK-SWITCH
V
BOOST
∆V
BOOST
/∆V
IN
∆V
BOOST
/∆I
O1
F
OSC-RANGE
F
OSC1
Quiescent Current - Shut-down
Quiescent Current - Switching
Feedback Voltage
Reference Voltage
Oscillator Set Voltage
Feedback Input Bias Current
Boost Converter Supply Range
Maximum Duty Cycle
Peak Internal FET Current
Switch On Resistance
Switch Leakage Current
Output Range
Line Regulation
Load Regulation
Frequency Range
Switching Frequency
at V
BOOST
= 10V, I(LX) total = 500mA
I(LX) total
V
BOOST
> V
IN
+ V
DIODE
2.7V < V
IN
< 13.2V, V
BOOST
= 15V
50mA < I
O1
< 300mA
R
OSC
range = 240kΩ to 60kΩ
R
OSC
= 100kΩ
200
620
680
5
0.1
0.5
1000
750
2
85
92
2.75
0.15
2
17
ENBN = ENP = 0V
ENBN = V
DDB
1.275
1.260
1.260
0.8
4.8
1.300
1.310
1.325
0.1
17
10
8
1.325
1.360
1.390
µA
mA
V
V
V
µA
V
%
A
Ω
µA
V
%
%
kHz
kHz
POSITIVE REGULATED CHARGE PUMP (V
ON
)
Most positive V
ON
output depends on the magnitude of the V
DDP
input voltage (normally connected to V
BOOST
) and the external component
configuration (doubler or tripler)
V
DDP
IQ1(V
DDP
)
IQ2(V
DDP
)
V(FBP)
I(FBP)
I(DRVP)
Supply Input for Positive Charge Pump
Quiescent Current - Shut-down
Quiescent Current - Switching
Feedback Reference Voltage
Feedback Input Bias Current
RMS DRVP Output Current
V
DDP
= 12V
V
DDP
= 6V
ILR_V
ON
F
PUMP
Load Regulation
Charge Pump Frequency
5mA < I
L
< 15mA
Frequency set by R
OSC
- see boost section
15
-0.5
0.03
0.5*F
OSC
0.5
Usually connected to V
BOOST
output
ENP = 0V
ENBN = ENP = V
DDB
1.245
5
11.5
2.3
1.310
0.1
60
17
20
5
1.375
V
µA
mA
V
µA
mA
mA
%/mA
2
EL7581
Electrical Specifications
PARAMETER
V
IN
= 3.3V, V
BOOST
= 12V,
R
OSC
= 100kΩ,
T
A
= 25°C Unless Otherwise Specified.
(Continued)
CONDITIONS
MIN
TYP
MAX
UNIT
DESCRIPTION
NEGATIVE REGULATED CHARGE PUMP (V
OFF
)
Most negative V
OFF
output depends on the magnitude of the V
DDN
input voltage (normally connected to V
BOOST
) and the external component
configuration (doubler or tripler)
V
DDN
IQ1(V
DDN
)
IQ2(V
DDN
)
V(FBN)
I(FBN)
I(DRVN)
Supply Input for Negative Charge Pump
Quiescent Current - Shut-down
Quiescent Current - Switching
Feedback Reference Voltage
Feedback Input Bias Current
RMS DRVN Output Current
Magnitude of input bias
V
DDN
= 12V
V
DDN
= 6V
ILR_V
OFF
F
PUMP
Load Regulation
Charge Pump Frequency
-15mA < I
L
< -5mA
Frequency set by R
OSC
- see boost section
15
-0.5
0.03
0.5*F
OSC
0.5
Usually connected to V
BOOST
output
ENBN = 0V
ENBN = V
DDB
-80
5
1.2
2.3
0
0.1
60
17
10
5
+80
V
µA
mA
mV
µA
mA
mA
%/mA
ENABLE CONTROL LOGIC
V
HI-ENX
V
LO-ENX
IL(EN”X”)
IL(ENBN)
IL(ENP)
Enable Input High Threshold
Enable Input Low Threshold
Logic Low Bias Current
Logic High Bias Current
Logic High Bias Current
X = “BN”, “P”
X = “BN”, “P”
X = “BN”, “P” = 0V
ENBN = 5V
ENP = 5V
0.1
7.5
3.3
15
7.5
1.4
0.6
V
V
µA
µA
µA
OVER-TEMPERATURE PROTECTION
T
OT
T
HYS
Over-temperature Threshold
Over-temperature Hysteresis
130
40
°C
°C
3
EL7581
Pin Descriptions
I = Input, O = Output, S = Supply
PIN NUMBER
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
PIN NAME
VSSB
SS
FBB
VDDB
LX
LX
LX
DRVN
VDDN
FBN
VSSP
FBP
VDDP
DRVP
PGND
PGND
VREF
ENBN
ENP
ROSC
PIN TYPE
S
I
I
S
O
O
O
O
S
I
S
I
S
O
O
O
I
I
I
I
PIN FUNCTION
Ground for DC-DC boost and reference circuits; chip substrate
Soft-start input; the capacitor connected to this pin sets the current limited start time
Voltage feedback input for boost circuit; determines boost output voltage, V
BOOST
Positive supply input for DC-DC boost circuits
Boost regulator inductor drive connected to drain of internal NFET
Boost regulator inductor drive connected to drain of internal NFET
Boost regulator inductor drive connected to drain of internal NFET
Driver output for the external generation of negative charge pump voltage, V
OFF
Positive supply for input for V
OFF
generator
Voltage feedback input to determine negative charge pump output, V
OFF
Negative supply pin for both the positive and negative charge pumps
Voltage feedback to determine positive charge pump output, V
ON
Positive supply input for V
ON
generator
Voltage driver output for the external generation of positive charge pump, V
ON
Power ground, connected to source of internal NFET
Power ground, connected to source of internal NFET
Voltage reference for charge pump circuits; decouple to ground
Enable pin for boost (V
BOOST
generation) and negative charge pump (V
OFF
generation);
active high
Enable for DRVP (V
ON
generation); active high
Connected to an external resistor to ground; sets the switching frequency of the DC-DC boost
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