MAX8930
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
General Description
The MAX8930 integrates a charge pump for white LED
display backlighting with ambient light control (ALC)
feature. The high-efficiency, adaptive-mode 1x/-0.5x
charge pump drives up to 11 LEDs (8 WLEDs + RGB
LED) with constant current for uniform brightness. The
LED current is adjustable from 0.1mA to 25.6mA in 256
linear steps through I
2
C. High accuracy and LED-to-LED
current matching are maintained throughout the adjust-
ment range. The MAX8930 includes soft-start, thermal
shutdown, open-circuit, and short-circuit protection.
Three 200mA LDOs are provided with programmable
output voltages to provide power to external circuitry.
These three LDOs can also be configured for a GPO
function through the I
2
C. A step-up converter is also
available on the MAX8930 for biasing a PMOLED sub-
panel.
The MAX8930 is available in the 49-bump, 3.17mm x
3.17mm WLP package.
S
White LED Charge Pump
S
Adaptive 1x or -0.5x Negative Modes
S
11 Low-Dropout LED Current Sinks with 25.6mA
S
S
S
S
S
S
S
S
S
S
S
S
INPUT
INPUT 2.7V TO 5.5V
PV1
PV2
PV3
PV5
INPUT 1.7V TO 5.5V
PV4
BIAS
INPUT
LIGHT
SENSOR
SENSE
WLED1
WLED2
WLED3
WLED4
WLED5
WLED6
WLED7
WLED8
Features
Simplified Application Circuit
S
to 0.1mA in 256 Dimming Steps
Ramp-Up/Down Control for Main White LED
Ramp-Up/Down Control for RGB LED
Individual Brightness Control for Each White,
RGB LED
Low 240µA (typ) Quiescent Current
Ambient Light Control (ALC) for Any Type of Light
Sensor
Content Adaptive Interface
I
2
C-Compatible Control Interface
Three Programmable LDOs Up to 200mA
Step-Up DC-DC Converter with Programmable
Output for PMOLED Application
Low 0.1µA Shutdown Current
2.7V to 5.5V Supply Voltage Range
Thermal Shutdown
Open and Short-Circuit Protection
Applications
Cell Phones and Smartphones
PDAs, Digital Cameras, Camcorders, and Other
Portable Equipment
Ordering Information
PART
MAX8930EWJ+
TEMP RANGE
-40NC to +85NC
PIN-PACKAGE
49 WLP
0.4mm pitch
MAX8930
RLED
GLED
BLED
CHG
KEY
+Denotes
a lead(Pb)-free/RoHS-compliant package.
2.3V TO 3.1V, 200mA
2.3V TO 3.1V, 200mA
1.2V, 1.5V, 1.8V, 2.5V, 200mA
13V TO 16.5V
µP
SCL
SDA
EN
CAI
PLAYR
PLAYG
PLAYB
REFBP
V
DD
LDO1
LDO2
LDO3
OUT
Typical Operating Circuit appears at end of data sheet.
FILT
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-4921; Rev 0; 3/10
MAX8930
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
ABSOLUTE MAXIMUM RATINGS
PV_, V
DD,
EN, CAI, PLAY_, BIAS,
SENSE, REFBP, ECAGND to AGND .................-0.3V to +6.0V
PV_, V
DD
, PGND_, AGND to NEG .......................-0.3V to +6.0V
ECAGND, PGND_ to AGND .................................-0.3V to +0.3V
WLED_, RGB_, C1N, C2N,
C1P, C2P to NEG .........-0.3V to (V
PV1
+ V
PV2
+ V
PV3
+ 0.3V)
FILT to AGND .......................................... -0.3V to (V
PV3
+ 0.3V)
SCL, SDA to AGND .................................. -0.3V to (V
DD
+ 0.3V)
LDO_ to AGND ............................ -0.3V to (V
PV3
+ V
PV4
+ 0.3V)
SW to PGND3 .......................................... -0.3V to (V
PV5
+ 0.3V)
LX, OUT to PGND3 ...............................................-0.3V to +22V
KEY to AGND ...........................................-0.3V to (V
PV3
+ 0.3V)
Continuous Power Dissipation (T
A
= +70NC)
49-Pin WLP 3.17mm x 3.17mm
(derate 20mW/NC above +70NC)................................1600mW
Operating Temperature Range .......................... -40NC to +85NC
Junction Temperature .....................................................+150NC
Storage Temperature Range............................ -65NC to +150NC
Soldering Temperature (reflow) ......................................+260NC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
PV_
= V
EN
= V
DD
= 3.7V, V
PGND_
and V
AGND
= 0V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 1)
PARAMETER
PV1, PV2, PV3, PV5 Operating
Voltage
Undervoltage Lockout Threshold
UVLO Hysteresis
PV4 Operating Voltage
V
DD
Operating Range
PV_ Shutdown Supply Current 1
(All Outputs Off, I
2
C Disabled)
PV_ Shutdown Supply Current 2
(All Outputs Off, I
2
C Enabled)
V
DD
Shutdown Threshold
V
DD
is supply voltage for I
2
C input block only; all other
logic is supplied from PV_
EN = AGND, V
DD
= 0V
V
DD
= V
PV3
, EN = AGND
T
A
= +25NC
T
A
= +85NC
T
A
= +25NC
T
A
= +85NC
1.15
1.7
1.7
0.1
0.1
2
2
1.4
240
6.8
1.65
400
10
V
PV1,
V
PV2,
V
PV3,
V
PV5
rising
CONDITIONS
MIN
2.7
2.25
2.45
100
5.5
5.5
1
TYP
MAX
5.5
2.65
UNITS
V
V
mV
V
V
FA
FA
V
FA
mA
V
DD
falling, hysteresis = 50mV
1x mode, no load, ALC off, step-up off, I
LDO_
= 0mA
-0.5x mode, 4MHz switching, each I
LED_
= 0.1mA,
ALC off, I
LDO
= 0mA, step-up I
o
= 0mA at V
PV3
= 2.7V
(Note 2)
0FA
P
I
REFBP
P
1FA
2.5V
P
V
PV3
P
5.5V
Supply Current
Reference Bypass (REFBP)
Output Voltage
REFBP Supply Rejection
Thermal Shutdown
Thermal Shutdown Hysteresis
1.164
1.200
0.2
+160
20
1.236
5
V
mV
NC
NC
2
Maxim Integrated
MAX8930
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
I
2
C INTERFACE CHARACTERISTICS
PARAMETER
SDA, SCL Input High Voltage
SDA, SCL Input Low Voltage
SDA, SCL Input Current
SDA Output Low Voltage
Clock Frequency
Bus-Free Time Between START
and STOP
Hold Time Repeated START
Condition
SCL Low Period
SCL High Period
Setup Time Repeated START
Condition
SDA Hold Time
SDA Setup Time
Setup Time for STOP Condition
V
DD
= 1.7V to 5.5V
V
DD
= 1.7V to 5.5V
V
IL
= 0V or V
IH
= 5.5V,
V
DD
= 5.5V
(Note 3)
t
BUF
(Note 3)
t
HD,STA
(Note 3)
t
LOW
(Note 3)
t
HIGH
(Note 3)
t
SU,STA
(Note 3)
t
HD,DAT
(Note 3)
t
SU,DAT
(Note 3)
t
SU,STO
(Note 3)
T
A
= +25NC
T
A
= +85NC
100
1.3
0.6
1.3
0.6
0.6
0
100
0.6
0.1
0.2
0.2
0.1
0.01
50
0.1
0.01
0.1
0.03
0.4
400
CONDITIONS
MIN
0.7 x
V
DD
0.3 x
V
DD
1
TYP
MAX
UNITS
V
V
FA
V
kHz
Fs
Fs
Fs
Fs
Fs
Fs
ns
Fs
I
SDA
= 3mA, for acknowledge (Note 3)
CHARGE PUMP CHARACTERISTICS
PARAMETER
Switching Frequency
Pump Soft-Start Time
Charge-Pump Regulation
Voltage (and OVP)
Open-Loop NEG Output
Resistance
Guaranteed Output Current
NEG Discharge Resistance in
Shutdown
V
PV1
, V
PV2
- V
NEG
(0.5 x (V
PV1 or
V
PV2
) - V
NEG
)/I
NEG
LED V
FMAX
= 3.9V, V
PV1
= V
PV2
= 3.2V
All LEDs off
281
10
4.3
CONDITIONS
MIN
TYP
4
0.5
5
1.3
2.49
MAX
UNITS
MHz
ms
V
I
mA
kI
Maxim Integrated
3
MAX8930
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
CURRENT SINK DRIVER CHARACTERISTICS
PARAMETER
Current Setting Range
CONDITIONS
WLED1–WLED8, RGB programmable by I
2
C
MIN
0.1
0
(default)
0.016
WLED_, RGB Ramp-Up/Ramp-
Down Time
Main WLED_ and RGB ramp-up/ramp-down in 0.1mA
increments; 8 steps are programmable through I
2
C;
ramp-up and ramp-down times are set separately
0.064
0.128
0.256
0.512
1.024
2.048
WLED_, RGB Current Accuracy
WLED_, RGB Current Matching
WLED_, RGB R
DSON
WLED_, RGB Current Regulator
Dropout Voltage
WLED_, RGB Current Regulator
Switchover Threshold
(1x to -0.5x)
WLED_, RGB Current Regulator
Switchover Hysteresis
WLED_, RGB Leakage in
Shutdown
All LEDs off
T
A
= +25NC
T
A
= +85NC
25.6mA setting, T
A
= +25NC
0.1mA setting, T
A
= +25NC
WLED1–WLED8, RGB (Note 4)
1x mode
-0.5x mode
25.6mA setting
(Note 5)
1x mode
-0.5x mode
125
T
A
= 0NC to +85NC
T
A
= -40NC
-2.5
-50
Q10
5
2.68
4.12
62
62
95
150
120
150
200
175
mV
mV
+2.5
+50
10
%
%
I
ms/
0.1mA
TYP
MAX
25.6
UNITS
mA
V
LED
falling
100
0.01
0.1
5
mV
FA
LDO1 CHARACTERISTICS
PARAMETER
Output Voltage V
LDO1
(Default)
CONDITIONS
200mA at V
PV3
= 3.6V
MIN
2.522
2.231
2.425
2.522
2.619
2.716
2.813
2.910
3.007
200
250
TYP
2.6
2.3
2.5
2.6
2.7
2.8
2.9
3.0
3.1
475
120
2.4
25
MAX
2.678
2.369
2.575
2.678
2.781
2.884
2.987
3.090
3.193
750
300
UNITS
V
Programmable Output Voltage
I
LDO1
= 50mA
V
Output Current
Current Limit
Dropout Voltage
Line Regulation
Load Regulation
4
mA
mA
mV
mV
mV
Maxim Integrated
V
LDO1
= 90% of nominal regulation voltage (Note 3)
I
LDO1
= 200mA, T
A
= +25NC
3.4V
P
V
PV3_
P
5.5V, I
LDO1
= 150mA
1mA < I
LDO1
< 200mA
MAX8930
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
LDO1 CHARACTERISTICS (continued)
PARAMETER
Power-Supply Rejection
DV
LDO1
/DV
PV3
Output Noise Voltage (RMS)
Minimum Output Capacitor
Startup Time from Shutdown
Startup Transient Overshoot
Shutdown Output Impedance
CONDITIONS
f = 10Hz to 10kHz, I
LDO1
= 10mA, C
LDO1
= 1FF
f = 100Hz to 100kHz, I
LDO1
= 10mA, C
LDO1
= 1FF
I
LDO1
< 200mA
I
LDO1
= 150mA (Note 3)
I
LDO1
= 150mA (Note 3)
LDO1 disabled through I
2
C (default on)
MIN
TYP
60
45
1
40
3
1
100
50
MAX
UNITS
dB
FV
RMS
FF
Fs
mV
kI
LDO2 CHARACTERISTICS
PARAMETER
Output Voltage V
LDO2
(Default)
CONDITIONS
200mA at V
PV3
= 3.6V
MIN
2.813
2.231
2.425
2.522
2.619
2.716
2.813
2.910
3.007
200
250
TYP
2.9
2.3
2.5
2.6
2.7
2.8
2.9
3.0
3.1
475
120
2.4
25
60
45
1
40
3
1
100
50
MAX
2.987
2.369
2.575
2.678
2.781
2.884
2.987
3.090
3.193
750
300
UNITS
V
Programmable Output Voltage
I
LDO2
= 50mA
V
Output Current
Current Limit
Dropout Voltage
Line Regulation
Load Regulation
Power-Supply Rejection
DV
LDO2
/DV
PV3
Output Noise Voltage (RMS)
Minimum Output Capacitor
Startup Time from Shutdown
Startup Transient Overshoot
Shutdown Output Impedance
V
LDO2
= 90% of nominal regulation voltage (Note 4)
I
LDO2
= 200mA, T
A
= +25NC
3.4V
P
V
PV3_
P
5.5V, I
LDO2
= 150mA
1mA < I
LDO2
< 200mA
f = 10Hz to 10kHz, I
LDO2
= 10mA, C
LDO2
= 1FF
f = 100Hz to 100kHz, I
LDO2
= 10mA, C
LDO2
= 1FF
I
LDO2
< 200mA
I
LDO2
= 150mA (Note 3)
I
LDO2
= 150mA (Note 3)
LDO2 disabled through I
2
C (default on)
mA
mA
mV
mV
mV
dB
FV
RMS
FF
Fs
mV
kI
Maxim Integrated
5
