Charge Pumps. MAX8630Z Datasheet

MAX8630Z Pumps. Datasheet pdf. Equivalent

Part MAX8630Z
Description Charge Pumps
Feature www.DataSheet4U.com 19-3689; Rev 1; 2/07 KIT ATION EVALU E L B A AVAIL 125mA 1x/1.5x Charge Pumps .
Manufacture Maxim Integrated Products
Datasheet
Download MAX8630Z Datasheet



MAX8630Z
www.DataSheet4U.com
19-3689; Rev 1; 2/07
EVAALVUAAILTAIOBNLEKIT
125mA 1x/1.5x Charge Pumps for
5 White LEDs in 3mm x 3mm TDFN
General Description
The MAX8630Y/MAX8630Z charge pumps drive up to 5
white LEDs with regulated constant current up to 125mA
total. By utilizing adaptive 1x/1.5x charge-pump modes
and very low-dropout current regulators, they achieve
high efficiency over the full 1-cell Li+ battery input volt-
age range. The 1MHz fixed-frequency switching allows
for tiny external components, and the regulation scheme
is optimized to ensure low EMI and low input ripple. An
integrated derating function protects the LEDs from
overheating during high ambient temperatures.
The MAX8630Y/MAX8630Z are factory trimmed for full-
scale LED current options of 15mA, 18mA, 20mA, and
25mA. The MAX8630Z uses two enable inputs (ENM for
3 main LEDs and ENS for 2 sub LEDs) for simple on/off
control and single-wire, serial-pulse dimming in 32 linear
steps. The MAX8630Y uses a single direct PWM input
(PWM) to control all 5 LEDs with DC current proportional
to the PWM duty cycle. If both ENM and ENS (or PWM)
are kept low for more than 4ms, the MAX8630_ enters
shutdown. The MAX8630Y/MAX8630Z are available in a
14-pin, 3mm x 3mm TDFN package (0.8mm max height).
Applications
Display Backlight (Up to 5 LEDs)
Main (3 LEDs) + Sub (2 LEDs) Displays
Cell Phones and Smartphones
PDAs, Digital Cameras, and Camcorders
Typical Operating Circuit
Features
93% Max/85% Avg. Efficiency (PLED/PBATT) Over
Li+ Battery Discharge
1% LED Current Accuracy
125mA Total Drive Capability
Adaptive 1x/1.5x Mode Switchover
Single-Wire, Serial-Pulse Dimming (MAX8630Z)
Independent On/Off/Dimming for Main and Sub
Linear—Full, 31/32nd, 30/32nd, … 1/32nd
Direct-PWM Dimming (MAX8630Y)
15, 18, 20, and 25mA Full-Scale Versions
Low 0.1µA Shutdown Current
Soft-Start Eliminates Inrush Current
Output Overvoltage Protection
Thermal-Derating Function Protects LEDs
14-Pin, 3mm x 3mm TDFN Package
Ordering Information
PART
PIN-
PACKAGE
TOP
MARK
PKG
CODE
MAX8630YETD15+T
14 TDFN
(3mm x 3mm)
AAS
T1433-2
Note: All devices are specified to operate over the -40°C to
+85°C operating temperature range.
+Denotes a lead-free package.
Ordering Information continued at end of data sheet.
Selector Guide appears at end of data sheet.
Pin Configuration
INPUT
2.7V TO 5.5V
1μF
ENABLE MAIN
ON/OFF AND
DIMMING
ENABLE SUB
ON/OFF AND
DIMMING
1μF
C1P C1N
IN OUT
GND MAX8630Z
LED1
LED2
ENM LED3
LED4
ENS LED5
C2P C2N
OUTPUT
1μF
MAIN
SUB
TOP VIEW
14 13 12 11 10 9 8
MAX8630Y
MAX8630Z
1234567
1μF
TDFN
3mm × 3mm
( ) ARE FOR MAX8630Y
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.



MAX8630Z
www.DataSheet4U.com
125mA 1x/1.5x Charge Pumps for 5 White LEDs
in 3mm x 3mm TDFN
ABSOLUTE MAXIMUM RATINGS
IN, OUT to GND.....................................................-0.3V to +6.0V
C1N, C2N, ENM, CPWM, ENS,
PWM to GND ............................................-0.3V to (VIN + 0.3V)
LED_ to GND ............................................-0.3V to (VOUT + 0.3V)
C1P, C2P to GND ...-0.3V to greater of (VOUT + 1V) or (VIN + 1V)
OUT Short Circuit to GND ..........................................Continuous
Continuous Power Dissipation (TA = +70°C)
14-Pin TDFN 3mm x 3mm
(derate 18.2mW/°C above +70°C) .............................1454mW
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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
(VIN = 3.6V, VGND = 0V, EN_ (PWM) = IN, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
IN Operating Voltage
Undervoltage-Lockout Threshold
Undervoltage-Lockout Hysteresis
VIN rising or falling
CONDITIONS
MIN TYP MAX UNITS
2.7 5.5 V
2.20 2.45 2.65
V
100 mV
Output Overvoltage Protection
Threshold
VOUT rising, any LED_ = GND
5V
No-Load Supply Current
1/32nd setting, 1.5x mode
1/32nd setting, 1x mode
1.4
0.35
Shutdown Supply Current
ENM = ENS (PWM) = GND
TA = +25°C
TA = +85°C
0.01 2
0.1
Soft-Start Time (tSOFT-START)
MAX8630_ETD15
2
15
Full-Scale LED Current
MAX8630_ETD18
MAX8630_ETD20
18
20
MAX8630_ETD25
25
Full-Scale LED Current Accuracy TA = +25°C
TA = -40°C to derating function start temperature
-1 ±0.3 +1
-3.5 ±0.3 +3.5
Derating Function Start
Temperature
40
mA
µA
ms
mA
%
°C
Derating Function Slope
LED_ Dropout Voltage
TA = +40°C to +85°C
100% LED setting (Note 2)
-1.67
%/°C
40 75 mV
1x to 1.5x Mode Transition
Threshold
VLED_ falling
88 mV
Input Voltage Mode Transition
Hysteresis
70 mV
1.5x Mode Regulation Voltage
OUT Pulldown Resistance in
Shutdown
Minimum of VLED_
ENM = ENS (PWM) = GND
122 mV
5 kΩ
2 _______________________________________________________________________________________







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