19-4190; Rev 0; 7/08
IT
TION K
VALUA
E
BLE
AVAILA
Dual SMPS Outputs, LDO, and Dual Charge
Pumps with I
2
C Interface for OLED
General Description
The MAX17065 provides the power-supply rails for active-
matrix, organic light-emitting diode (OLED) displays.
The MAX17065 includes a step-up DC-DC converter,
an inverting DC-DC converter, a regulated positive
charge pump, a regulated negative charge pump, and
a low-dropout linear regulator (LDO). Synchronous rec-
tifiers are integrated into the IC, eliminating the need for
external power components. An I
2
C interface is used to
program the switching frequency, the operating mode,
and the cycle-by-cycle current limit of the noninverting
and step-up converters, as well as the output voltages
of the inverting converter and the charge pumps.
Efficiency of 94% can be achieved for the step-up and
83% for the inverting converter.
The MAX17065 is packaged into a space-efficient
28-pin, 4mm x 4mm TQFN package with an exposed
backside pad (EP) to enhance thermal characteristics.
Features
o
2.3V to 4.5V Input Voltage Supply Range
o
Fixed +5.35V Step-Up DC-DC Converter
o
Adjustable -0.5V to -5.0V Inverting DC-DC
Converter
o
Adjustable 450mA/700mA Cycle-by-Cycle Current
Limit for DC-DC Converters
o
Selectable SKIP or Forced-PWM Mode for DC-DC
Converters
o
600kHz/1.2MHz Selectable Fixed-Switching
Frequency
o
+5.5V to +9.0V Adjustable Positive-Regulated
Charge Pump
o
-5.0V to -0.5V Adjustable Negative-Regulated
Charge Pump
o
+1.9V 60mA LDO
o
Integrated Synchronous Rectifiers
o
True Shutdown™
o
Output Undervoltage Shutdown with 100ms Timer
o
Startup Sequence with 4ms Soft-Start
o
3µA (typ) Shutdown Supply Current
o
Thermal Shutdown with 15ms Timer
o
I
2
C Interface Control
o
Greater than 90% Efficiency
o
Small, 4mm x 4mm, 28-Pin Thin QFN
MAX17065
Applications
Cell Phones
Digital Still Cameras
MP3 Players
Minimal Operating Circuit
V
VD
+1.9V
60mA
VD
BSTN
LXN
REGN
V
VN
VN
VNS
EP
VP
V
VP
IN
LXP
PGND
VM
VMS
V
IN
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX17065ETI+
-40°C to +85°C
28 Thin QFN
+Denotes
a lead-free/RoHS-compliant package.
MAX17065
COMN
CL+
CL-
V
VL
VL
SDA
SCL
VDDIO
CLK
SHDN
AGND
COMP
CH+
CH-
VH
V
VH
VA
V
VA
Pin Configuration appears at end of data sheet.
True Shutdown is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Dual SMPS Outputs, LDO, and Dual Charge
Pumps with I
2
C Interface for OLED
MAX17065
ABSOLUTE MAXIMUM RATINGS
IN, SDA, SCL, VMS, VDDIO to AGND ......................-0.3V to +6V
SHDN,
CLK to AGND ..............................-0.3V to (V
DDIO
+ 0.3V)
COMP, COMN to AGND...........................-0.3V to (V
VMS
+ 0.3V)
VD to AGND.................................................-0.3V to (V
IN
+ 0.3V)
LXP to PGND ..............................................-0.3V to (V
VM
+ 0.3V)
VM to PGND .............................................................-0.3V to +6V
VP to PGND ...........................................(V
VM
- 6V) to (V
VM
+ 6V)
VA to PGND................................................-0.3V to (V
VM
+ 0.3V)
PGND to AGND .....................................................-0.3V to +0.3V
VN to PGND..............................................................-9V to +0.3V
VNS to VN..............................................................-0.3V to +0.3V
LXN to VN ....................................................-0.3V to (V
IN
+ 0.3V)
REGN to VN..............................................................-0.3V to +6V
BSTN to VN .............................................(V
REGN
- 0.3V) to +18V
BSTN to LXN.............................................................-0.3V to +6V
VH to PGND............................................................-0.3V to +14V
CH- to PGND ..............................................-0.3V to (V
VM
+ 0.3V)
CH+ to PGND ................................................-0.3V to (V
VH
+ 6V)
VL to PGND ..............................................................-6V to +0.3V
CL+ to PGND .............................................-0.3V to (V
VM
+ 0.3V)
CL- to PGND ...............................................(V
VL
- 0.3V) to +0.3V
VD to AGND Short Circuit ..........................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
28-Pin TQFN (derate 20.8mW/°C above +70°C).......1667mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +160°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
(Circuit of Figure 1, VP, VN, VL, VH enabled, default output values set according to Tables 7, 8, 9, skip mode enabled, V
VM
= 5.5V,
V
VN
, V
VH
, V
VL
set 50mV beyond their regulation points (not switching), V
IN
= 3.3V,
T
A
=
0°C to +85°C,
unless otherwise noted.)
PARAMETER
IN Input Voltage Range
IN Shutdown Supply Current
+ LXP Leakage Current
IN Standby Supply Current
IN Undervoltage-Lockout (UVLO) Threshold
VD REGULATOR
VD Output Voltage
VD Undervoltage-Lockout Threshold
VD Short-Circuit Current
STEP-UP REGULATOR
VM Regulation Voltage
VM Load Regulation
VM Transconductance
LXP Current-Sense Transresistance
VP-to-PGND Discharge Resistance
LXP-to-PGND On-Resistance
LXP-to-VM On-Resistance
LXP Current Limit
LXP-to-VM Zero-Crossing Threshold
LXP-to-IN Damping Switch Resistance
V
IN
= 2.3V to 4.5V
0 < I
LOAD
< 120mA
I
= ±2.5μA at COMP, V
VM
= 5.35V
VP discharge mode
V
VM
= 5.35V
V
VM
= 5.35V
VSW register bit 5 = 1 (high value), duty = 38%
VSW register bit 5 = 0 (low value), duty = 38%
Skip mode only
Skip mode, V
VM
= 5.5V
0.6
0.36
20
0.5
5.25
5.35
0.1
35
0.75
100
0.25
0.5
0.7
0.45
25
100
70
1.0
200
0.5
1
0.8
0.54
5.45
V
%
μS
V/A
A
mA
V
IN
= 2.3V to 4.5V, 0 < I
LOAD
< 60mA
V
VD
rising, typical hysteresis is 60mV
1.8
1.3
70
1.9
1.4
1.95
1.5
160
V
V
mA
SHDN
= low , V
IN
= 4.5V, VD off,
T
A
= +25°C
VP, VN, VL, VH disabled, VD enabled,
V
IN
= 2.3V to 4.5V
V
IN
rising, typical hysteresis is 50mV
2.00
CONDITIONS
MIN
2.3
3
300
2.10
TYP
MAX
4.5
7
600
2.20
UNITS
V
μA
μA
V
2
_______________________________________________________________________________________
Dual SMPS Outputs, LDO, and Dual Charge
Pumps with I
2
C Interface for OLED
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, VP, VN, VL, VH enabled, default output values set according to Tables 7, 8, 9, skip mode enabled, V
VM
= 5.5V,
V
VN
, V
VH
, V
VL
set 50mV beyond their regulation points (not switching), V
IN
= 3.3V,
T
A
=
0°C to +85°C,
unless otherwise noted.)
PARAMETER
LXP Negative Current Limit
VM-to-VP On-Resistance
VM-to-VA On-Resistance
VP Leakage Current
VM Soft-Start Time
VP Soft-Start Time
VA-to-PGND Discharge Resistance
VM-to-VA Impedance at Startup
VM-to-VA Delay to Low Impedance
INVERTING REGULATOR
V
VN
= -0.5V
VN Regulation Voltage Accuracy
V
IN
= 2.3V to 4.5V
with respect to the
V
VN
Table 9 voltage
0 < I
LOAD
< 120mA
I
= ±2.5μA at COMN, V
VN
= -4.5V
VN discharge mode
V
VM
= 5.35V, V
BSTN
- V
LXN
= 4.5V
V
VM
= 5.35V
VSW register bit 4 = 1 (high value), duty = 80%
VSW register bit 4 = 0 (low value), duty = 80%
Skip mode only
Forced PWM only; it is a peak value;
average value is (LXN negative current
limit - I
RIPPLE
/2)
V
VN
= V
VNS
= -8V, test mode,
T
A
= +25°C (Note 1)
100
3
FSET = 1
FSET = 0
1080
540
80
V
VH
= +6V, V
VL
= -4V, FSET = 0
V
VH
= +6V, V
VL
= -4V, FSET = 1
270
540
4
1200
600
85
300
600
5
1320
660
90
330
660
0.6
0.36
20
0.3
V
VN
= -1.0V, -1.5V
or -2.0V
V
VN
-2.5V
-7
-4
-2
0.1
35
0.6
120
0.5
0.5
0.7
0.45
20
-0.3
70
0.9
250
1
1
0.8
0.54
CONDITIONS
Forced PWM only; it is a peak value;
average value is (LXP negative current
limit - I
RIPPLE
/2)
V
VM
= 5.35V
V
VM
= 5.35V
V
VP
= +8V, VM in regulation
test mode, T
A
= +25°C (Note 1)
3
3
MIN
TYP
-0.3
0.4
3
0.8
6
10
4
4
100
100
5
5
200
200
1
+7
+4
+2
%
μS
V/A
A
mA
A
%
MAX
UNITS
A
μA
ms
ms
ms
MAX17065
VN Load Regulation
VN Transconductance
LXN Current-Sense Transresistance
VN-to-PGND Discharge Resistance
LXN-to-IN On-Resistance
LXN-to-VN On-Resistance
LXN Current Limit
LXN-to-VN Zero Crossing
LXN Negative Current Limit
VN + VNS Leakage Current
LXN-to-PGND Damping Switch Resistance
VN Soft-Start Time
OSCILLATOR
LXN, LXP Switching Frequency
LXN, LXP Maximum Duty Cycle
CLx, CHx Switching Frequency
20
μA
ms
V
IN
= 3.3V
kHz
%
kHz
_______________________________________________________________________________________
3
Dual SMPS Outputs, LDO, and Dual Charge
Pumps with I
2
C Interface for OLED
MAX17065
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, VP, VN, VL, VH enabled, default output values set according to Tables 7, 8, 9, skip mode enabled, V
VM
= 5.5V,
V
VN
, V
VH
, V
VL
set 50mV beyond their regulation points (not switching), V
IN
= 3.3V,
T
A
=
0°C to +85°C,
unless otherwise noted.)
PARAMETER
CHARGE PUMPS
VH Adjustable Voltage Range
VL Adjustable Voltage Range
CH-, CL+ to VM, CH-, CL+ to PGND
On-Resistance
CH+ to VM, CH+ to VH, CL- to VL,
CL- to PGND On-Resistance
VH Voltage-Regulation Threshold
With respect to the V
VH
Table 7 voltage,
V
VM
= 5.35V
With respect to the
V
VL
Table 8
voltage, V
VM
=
5.35V
V
VL
= -0.5V
V
VL
= -1.0V
V
VL
= -1.5V or -2
V
VL
-2.5V
-2
-10
-5
-4
-2
100
100
V
VH
= +9V, test mode, T
A
= +25°C (Note 1)
V
VL
= -5.0V, test mode, T
A
= +25°C (Note 1)
3
3
VMS falling, V
VMS
> V
IN
V
A
falling
VMS rising, typical hysteresis is 90mV
With respect to the
regulation voltage,
VNS rising
V
VN
= -0.5V to -1.5V
V
VN
-2.0V
4
4.15
-0.35
27
74
75
27
74
100
Hysteresis = 20°C
12
4
4
4.2
4.37
-0.2
60
80
80
60
80
120
160
15
18
See Table 7 for output settings
See Table 8 for output settings (Note 3)
5.5
-5.0
4
10
9.0
-0.5
8
25
+2
+10
+5
+4
+2
200
200
10
10
5
5
4.4
4.59
-0.1
90
%
85
85
90
%
85
145
ms
°C
ms
%
μA
μA
ms
ms
V
V
V
%
V
V
%
CONDITIONS
MIN
TYP
MAX
UNITS
VL Voltage-Regulation Threshold
VL Discharge Resistance
VH Discharge Resistance
VH Leakage Current
VL Leakage Current
VH Soft-Start Time
VL Soft-Start Time
PROTECTION
VMS UVP Threshold Voltage
VA UVP Threshold Voltage
VMS-to-V
IN
Disable Threshold Voltage
VNS UVP Threshold-Voltage Tolerance
VH UVP Threshold-Voltage Tolerance
With respect to the regulation voltage,
VH falling
With respect to the
regulation voltage,
VL rising
V
VL
= -0.5V to -1.5V
V
VL
-2.0V
VL UVP Threshold-Voltage Tolerance
UVP Shutdown Delay
Thermal Shutdown
Thermal-Shutdown Delay
4
_______________________________________________________________________________________
Dual SMPS Outputs, LDO, and Dual Charge
Pumps with I
2
C Interface for OLED
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, VP, VN, VL, VH enabled, default output values set according to Tables 7, 8, 9, skip mode enabled, V
VM
= 5.5V,
V
VN
, V
VH
, V
VL
set 50mV beyond their regulation points (not switching), V
IN
= 3.3V,
T
A
=
0°C to +85°C,
unless otherwise noted.)
PARAMETER
LOGIC INPUTS (SDA, SCL)
I
2
C Frequency Range
SDA, SCL Input Logic-High Voltage
SDA, SCL Input Logic-Low Voltage
SDA, SCL Pullup Resistance to VD
SDA Pulldown Current
VDDIO Operating Voltage Range
VDDIO UVLO Threshold Voltage
VDDIO Bias Current
SHDN,
CLK Input Logic-High Voltage
SHDN,
CLK Logic Input Logic-Low Voltage
SHDN
Pulldown Resistance
50
100
V
CLK
= 0 or VDDIO,
SHDN
= open
0.7 x
V
VDDIO
0.3 x
V
VDDIO
200
V
SDA
= 0.4V
V
SDA
= 0.4V
5
10
1.6
1.2
1.4
5.5
1.6
2
10
10
0.7 x
V
VD
0.3 x
V
VD
20
100
kHz
V
V
k
mA
V
V
μA
V
V
k
CONDITIONS
MIN
TYP
MAX
UNITS
MAX17065
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, VP, VN, VL, VH enabled, default output values set according to Tables 7, 8, 9, skip mode enabled, V
VM
= 5.5V, V
VN
,
V
VH
, V
VL
set 50mV beyond their regulation points (not switching), V
IN
= 3.3V,
T
A
= -40°C to +85°C,
unless otherwise noted.) (Note 2)
PARAMETER
IN Input Voltage Range
IN Standby Supply Current
IN Undervoltage-Lockout Threshold
VD REGULATOR
VD Output Voltage
VD Undervoltage-Lockout Threshold
VD Short-Circuit Current
V
IN
= 2.3V to 4.5V, 0 < I
LOAD
< 60mA
V
VD
rising, typical hysteresis is 60mV
1.8
1.25
55
1.95
1.6
180
V
V
mA
VP, VN, VL, VH disabled, VD enabled,
V
IN
= 2.3V to 4.5V
V
IN
rising, typical hysteresis is 50mV
CONDITIONS
MIN
2.3
TYP
MAX
4.5
600
2.05
2.20
UNITS
V
μA
V
_______________________________________________________________________________________
5
测试/测量
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
