LM27964SQ-C/NOPB National Semiconductor, LM27964SQ-C/NOPB Datasheet - Page 4

• Manufacturer Part Number: LM27964SQ-C/NOPB
• Description: IC LED DRIVR WHITE BCKLGT 24-LLP
• Manufacturer: National Semiconductor
• Type: Backlight, White LED (I²C Interface)r
• Series: -r

Specifications of LM27964SQ-C/NOPB

• Constant Current: Yes
• Topology: PWM, Switched Capacitor (Charge Pump)
• Number Of Outputs: 7
• Internal Driver: Yes
• Type - Primary: Backlight, General Purpose
• Type - Secondary: White LED
• Frequency: 500kHz ~ 900kHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Voltage - Output: 2 V ~ 4 V
• Mounting Type: Surface Mount
• Package / Case: 24-LLP
• Operating Temperature: -30°C ~ 85°C
• Current - Output / Channel: 30mA
• Internal Switch(s): Yes
• Efficiency: 87%
• Led Driver Application: Camera Phone LED Flash, LED Backlight
• No. Of Outputs: 7
• Output Current: 180mA
• Input Voltage: 2.7V To 5.5V
• Operating Temperature Range: -30°C To +85°C
• Rohs Compliant: Yes
• Constant Voltage: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM27964SQ-C; LM27964SQ-C; LM27964SQ-C-TR

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I
I
I
V
I
I
I
I
f
t
f
D.C. Step Diode Current Duty Cycle Step
I
V
V
V
V
I
t
t
t
t
t
Dxx-MATCH
Q
SD
DxA-B /
SETA-B
DKEY
SETK
SW
START
PWM
2
2
1
2
3
4
5
Symbol
SET
C Compatible Interface Voltage Specifications (SCL, SDIO, VIO)
IO
IL
IH
OL
C Compatible Interface Timing Specifications (SCL, SDIO, VIO)(Note 13)
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under which operation
of the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions,
see the Electrical Characteristics tables.
Note 2: All voltages are with respect to the potential at the GND pin.
Note 3: Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at T
= 165°C (typ.).
Note 4: For detailed soldering specifications and information, please refer to National Semiconductor Application Note 1187: Leadless Leadframe Package
(AN-1187).
Note 5: The Human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin. MIL-STD-883 3015.7
Note 6: In applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may have to be
derated. Maximum ambient temperature (T
dissipation of the device in the application (P
following equation: T
/
LED Current Matching
Quiescent Supply Current
Shutdown Supply Current
I
Output Current to Current Set Ratio
BankA and BankB
Output Current to Current Set Ratio
DKEY
Switching Frequency
Start-up Time
Internal Diode Current PWM
Frequency
Serial Bus Voltage Level
Input Logic Low "0"
Input Logic High "1"
Output Logic Low "0"
SCL (Clock Period)
Data In Setup Time to SCL High
Data Out stable After SCL Low
SDIO Low Setup Time to SCL Low
(Start)
SDIO High Hold Time After SCL High
(Stop)
SET
Pin Voltage
A-MAX
= T
Parameter
J-MAX-OP
– (θ
JA
A-MAX
× P
D-MAX
D-MAX
) is dependent on the maximum operating junction temperature (T
), and the junction-to ambient thermal resistance of the part/package in the application (θ
).
(Note 12)
Gain = 1.5x, No Load
All ENx bits = "0"
2.7V
P
LM27964SQ-I
LM27964SQ-C
2.7V
2.7V
I
LOAD
OUT
≤
≤
≤
= 90% steady state
= 2mA
V
V
V
IN
IN
IN
≤
≤
≤
5.5V
5.5V
5.5V
4
Condition
J-MAX-OP
0.73 ×
20138113
Min
500
100
100
100
1.8
V
2.5
0
0
IO
J
= 100°C), the maximum power
= 170°C (typ.) and disengages at T
1.25
1/16
Typ
200
800
700
250
0.2
1.3
3.0
10
23
JA
), as given by the
0.27 ×
Max
900
400
1.7
V
V
V
2
5
IN
IO
IO
Fullscal
Units
kHz
kHz
mA
mV
µA
µs
µs
ns
ns
ns
ns
%
V
V
V
V
e
J