Rainbow Electronics MAX17008 User Manual
General Description
The MAX17007A/MAX17008 are dual Quick-PWM™
step-down controllers intended for general power generation in battery-powered systems. The two switchedmode power supplies (SMPSs) can also be combined to
operate in a two-phase single-output mode. Constant
on-time Quick-PWM operation provides fast response to
load transients and handles wide input/output (I/O) voltage ratios with ease, while maintaining a relatively constant switching frequency. The switching frequency can
be individually adjusted between 200kHz and 600kHz
with external resistors. Differential output current sensing allows output sense-resistor sensing for an accurate
current limit, or lossless inductor direct-current resistance (DCR) current sensing for lower power dissipation
while maintaining 0.7% output accuracy. Overvoltage
(MAX17007A only), undervoltage protection, and accurate user-selectable current limits (15mV, 30mV, 45mV,
and 60mV) ensure robust operations.
The SMPS outputs can operate in skip mode or in ultrasonic mode for improved light-load efficiency. The ultrasonic mode eliminates audible noises by maintaining a
minimum switching frequency of 25kHz in pulseskipping mode.
The output voltage of SMPS1 can be dynamically
adjusted by changing the voltage at the REFIN1 pin.
The device includes a 0.5% accurate reference output
that can be used to set the REFIN1 voltage. An external
5V bias supply is required to power the internal circuitry
and its gate drivers.
Independent on/off controls with well-defined logic thresholds and independent open-drain power-good outputs
provide flexible system configurations. To prevent current
surges at startup, the internal voltage target is slowly
ramped up from zero to the final target with a slew rate of
1.3mV/μs for SMPS1 at CSL1 and 0.65mV/μs for SMPS2
at FB2. To prevent the output from ringing off below
ground in shutdown, the internal voltage target is ramped
down from its previous value to zero with the same
respective slew rates. Integrated bootstrap switches
eliminate the need for external bootstrap diodes.
The MAX17007A/MAX17008 are available in a spacesaving, 28-pin, 4mm x 4mm, thin QFN package with an
exposed backside pad.
Applications
Features
o Dual Quick-PWM with Fast Transient Response
o Automatic Dynamic REFIN1 Detection and
PGOOD1/Fault Blanking
o Fixed and Adjustable Output Voltages
±0.7% Output Accuracy Over Line and Load
OUT1: 0 to 2V Dynamic Output or Preset 1.05V
OUT2: 0.7V to 2V Range or Preset 1.5V
o Resistor-Programmable Switching Frequency
o Integrated BST Switches
o Differential Current-Sense Inputs
Low-Cost DCR Sensing or Accurate CurrentSense Resistors
Internally Coupled Current-Sense Compensation
o Combinable Mode Supports High-Current
Dynamic Output Voltages
o Selectable Forced-PWM, Pulse Skip, or Ultrasonic
Mode Operation
o 26V Maximum Input Voltage Rating
o Independent Enable Inputs
o Independent Power-Good Outputs
o Overvoltage Protection (MAX17007A Only)
o Undervoltage/Thermal Protection
o Voltage Soft-Start and Soft-Shutdown
MAX17007A/MAX17008
Dual and Combinable QPWM Graphics
Core Controllers for Notebook Computers
________________________________________________________________
Maxim Integrated Products
1
MAX17007A
MAX17008
18
THIN QFN
(4mm x 4mm)
4175166
15
1422
7
19
3202
21
1323
1224
1125
1026
927
828
1
LX1
DH1
PGOOD1
EN1
CSH1
TOP VIEW
*EP
*EP = EXPOSED PAD.
CSL1
REFIN1
LX2
DH2
PGOOD2
EN2
CSH2
CSL2
FB2
BST2
PGND
DL2
VDDDL1
GND
BST1
REF
ILIM1
(CCI) ILIM2
V
CC
SKIP
TON1
TON2
+
Pin Configuration
Ordering Information
19-3200; Rev 2; 10/08
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.
EVALUATION KIT
AVAILABLE
+
Denotes a lead-free/RoHS-compliant package.
*
EP = Exposed pad.
PART TEMP RANGE PIN-PACKAGE
MAX17007AGTI+ -40°C to +105°C 28 Thin QFN-EP*
MAX17008GTI+ -40°C to +105°C 28 Thin QFN-EP*
Notebook Computers
Low-Power I/O Supplies
GPU Core Supplies
2 to 4 Li+ Cells BatteryPowered Devices
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
MAX17007A/MAX17008
Dual and Combinable QPWM Graphics
Core Controllers for Notebook Computers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VIN= 12V, VDD= VCC= V
EN1
= V
EN2
= 5V, V
REFIN1
= 2V, SKIP = GND, TA= 0 to +85°C, unless otherwise noted. Typical values are
at T
A
= +25°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.
BST1, BST2 to GND ...............................................-0.3V to +34V
BST1, BST2 to V
DD
.................................................-0.3V to +28V
TON1, TON2 to GND..............................................-0.3V to +28V
V
DD
to GND..............................................................-0.3V to +6V
V
DD
to VCC............................................................-0.3V to +0.3V
LX1 to BST1..............................................................-6V to +0.3V
LX2 to BST2..............................................................-6V to +0.3V
DH1 to LX1 ..............................................-0.3V to (V
BST1
+ 0.3V)
DH2 to LX2 ..............................................-0.3V to (V
BST2
+ 0.3V)
ILIM1, ILIM2, REF to GND ..........................-0.3V to (V
CC
+ 0.3V)
CSH1, CSH2, CSL1, CSL2, FB2, REFIN1 to GND....-0.3V to +6V
EN1, EN2, SKIP, PGOOD1, PGOOD2 to GND.........-0.3V to +6V
DL1 to GND ................................................-0.3V to (V
DD
+ 0.3V)
DL2 to PGND..............................................-0.3V to (V
DD
+ 0.3V)
PGND to GND ......................................................-0.3V to + 0.3V
REF Short Circuit to GND ...........................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
28-Pin TQFN T2844-1
(derate 20.8mW/°C above +70°C) ............................1667mW
Extended Operating Temperature Range .........-40°C to +105°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
PWM CONTROLLER
Input Voltage Range V
IN
4.5 26 V
Quiescent Supply Current
(V
DD
, VCC)
I
DD
+ I
CC
Output forced above regulation vo ltage,
V
EN1
= V
EN2
= 5V
1.7 2.5 mA
Shutdown Supply Current
(V
DD
, VCC)
I
SHDN
EN1 = EN2 = GND, TA = +25°C 0.1 5 μA
R
TON1
= R
TON2
=
97.5k (600kHz)
142
(-15%)
174
194
(+15%)
R
TON1
= R
TON2
=
200k (300kHz)
305
(-10%)
336
368
(+10%)
On-Time (Note 1) t
ON1
, t
ON2
VIN = 12V,
V
CSL1
= V
CSL2
=
V
CCI
= 1.2V,
separate or
combined mode
R
TON1
= R
TON2
=
302.5 k (200kH z)
425
(-15%)
500
575
(+15%)
ns
Minimum Off-Time t
OFF(MIN)
(Note 1) 250 400 ns
TON1, TON2, Shutdown Supply
Current
I
TON1
,
I
TON2
EN1 = EN2 = GND, V
TON1
= V
TON2
= 26V,
V
DD
= 0 or 5V, TA = +25°C
0.01 1 μA
REFIN1 Voltage Range V
REFIN1
(Note 2) 0 V
REF
V
FB2 Regulation Voltage V
FB2
Adju stable mode 0.7 V
FB2 Input Voltage Range Preset mode 1.7 2.3 V
FB2 Combined-Mode Threshold Comb ined mode 3.8
V
CC
-
1V
VCC -
0.4
V
REFIN1 Dual Mode™
Switcho ver Threshold
3.8
VCC -
1V
VCC -
0.4
V
REFIN1, FB2 Bias Current
I
REFIN1
,
I
FB2
REFIN1 = 0.5V to 2V;
V
FB2
= 0.7V, TA = +25°C
-0.1 +0.1 μA
V
CSL1
Measured at CSL1, REFIN1 = VCC,
V
IN
= 2V to 26V, SKIP = VCC (Note 2)
1.043 1.05 1.057 V
TA = +25°C -12 +12
REFIN1 = 500mV,
SKIP = V
CC
TA = 0°C to +85°C -20 +20
SMPS1 Voltage Accuracy
V
CSL1
-
V
REFIN1
REFIN1 = 2V, SKIP = VCC -20 +20
mV
Dual Mode is a trademark of Maxim Integrated Products, Inc.
MAX17007A/MAX17008
Dual and Combinable QPWM Graphics
Core Controllers for Notebook Computers
_______________________________________________________________________________________ 3
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SMPS2 Voltage Accuracy V
CSL2
Measured at CSL2, FB2 = REF,
V
IN
= 2V to 26V, SKIP = V
CC
1.489 1.5 1.511 V
Load Regulation Error I
LOAD
= 0 to full load, SKIP = V
CC
(Note 3) 0.1 %
Line Regulation Error VDD = 4.5V to 5.5V, VIN = 4.5V to 26V (Note 3) 0.25 %
CSL1 Soft-Start/-Stop Slew Rate SR
SS1
Risi ng/fall ing edge on EN1 1.25 mV/μs
FB2 Soft-Start/-Stop Slew Rate SR
SS2
Rising/falling edge on EN2 0.63 mV/μs
Dynamic REFIN1 Slew Rate SR
DYN
Risi ng edge on REFIN1 11.4 mV/μs
INTERNAL REFERENCE
Reference Voltage V
REF
VDD = 4.5V to 5.5V 1.990 2.000 2.010 V
Reference Lockout Voltage V
REF(UVLO)
Risi ng edge, hysteresis = 230mV 1.8 V
Reference Load Regulation I
REF
= -10μA to +100μA 1.980 2.015 mV
FAULT DETECTION
With respect to the internal target vo ltage
(error comparator threshold); rising edge;
hystere sis = 50mV
260 300 340 mV
Dynamic transition V
REF
+ 0.30 V
SMPS1 Overvoltage Trip
Threshold and PGOOD1 Upper
Threshold
(MAX17007A Only)
V
OVP1
,
V
PG1_H
Minimum OVP threshold 0.7 V
SMPS2 Adjustable Mode
Overvoltage Trip Threshold and
PGOOD2 Upper Threshold
(MAX17007A Only)
V
OVP2
,
V
PG2_H
With respect to the internal target vo ltage
0.7V (error comparator threshold);
hystere sis = 50mV
120 150 180 mV
Output Overvoltage Fault
Propagati on De lay
(MAX17007A Only)
t
OVP
CSL1/FB2 forced 25mV above trip threshold 5 μs
SMPS1 Undervoltage Protection
Trip Threshold and Lower
PGOOD1 Threshold
V
UVP1
,
V
PG1_L
With respect to the internal target vo ltage
(error comparator threshold); falling edge;
hystere sis = 50mV
-240 -200 -160 mV
SMPS2 Undervoltage Protection
Trip Threshold and Lower
PGOOD2 Threshold
V
UVP2
,
V
PG2_L
With respect to the internal target vo ltage
0.7V (error comparator threshold);
falling edge; hysteresis = 50mV
-130 -100 -70 mV
Output Undervoltage Fault
Propagati on De lay
t
UVP
CSL1/FB2 forced 25mV below trip threshold 90 205 360 μs
UVP falling edge, 25mV overdrive 5
OVP rising edge, 25mV overdrive 5
PGOOD_ Propagation Dela y t
PGOOD
Startup delay from regulation 90 205 360
μs
PGOOD_ Output Low Voltage I
SINK
= 3mA 0.4 V
PGOOD_ Lea kage Current I
PGOOD
CSL1 = REFIN1, FB2 = 0.7V (PGOOD_ high
impedance), PGOOD_ forced to 5V, T
A
= +25°C
1 μA
Dynamic REFIN1 Transition
Fault-Blanking Threshold
Fault blanking initiated; REFIN1 deviation
from the internal target vo ltage (error
comparator threshold); hy steresis = 10mV
±50 mV
Thermal-Shutdown Threshold T
SHDN
Hysteresis = 15°C (Note 3) 160 °C
VCC Undervoltage Lockout
Threshold
V
UVLO(VCC)
Ri sing edge, PWM disab led below this level,
hysteresis = 100mV
3.95 4.20 4.45 V
ELECTRICAL CHARACTERISTICS (continued)
(VIN= 12V, VDD= VCC= V
EN1
= V
EN2
= 5V, V
REFIN1
= 2V, SKIP = GND, TA= 0 to +85°C, unless otherwise noted. Typical values are
at T
A
= +25°C.)
MAX17007A/MAX17008
Dual and Combinable QPWM Graphics
Core Controllers for Notebook Computers
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(VIN= 12V, VDD= VCC= V
EN1
= V
EN2
= 5V, V
REFIN1
= 2V, SKIP = GND, TA= 0 to +85°C, unless otherwise noted. Typical values are
at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
CURRENT LIMIT
CSH1, CSH2 0 2.3
Current-Sense Input Range
CSL1, CSL2 0 2.3
V
Current-Sense Input (CSH_)
Leakage Current
CSH_ = GND or V
CC
, TA = +25°C -0.2 +0.2 μA
Current-Sense Input (CSL_)
Leakage Current
CSL_= CSL_ = 2V, T
A
= +25°C 1 μA
TA = +25°C 28 30 32
V
CSH_
- V
CSL_
ILIM1 = ILIM2 = REF
T
A
= 0°C to +85°C 27 30 33
V
CSH_
- V
CSL_
, ILIM1 = ILIM2 = VCC 56 60 64
V
CSH_
- V
CSL_
, ILIM1 = ILIM2 = OPEN 42 45 48
Current-Limit Threshold (Fixed) V
CSLIMIT
V
CSH_
- V
CSL_,
ILIM1 = ILIM2 = GND 13 15 17
mV
Current-Limit Threshold
(Negative)
V
NEG
V
CSH_
- V
CSL_
, SKIP = V
CC
-1.2 x
V
CSLIMIT
mV
Current-Limit Threshold
(Zero Crossing)
V
ZX
V
CSH_
- V
CSL_
, SKIP = GND or OPEN;
ILIM1 = ILIM2 = REF
1 mV
Ultrasonic Frequency
SKIP = open (3.3V); V
CSL1
= V
REFIN1
+ 50mV;
V
CSL2
= V
FB2
+ 50mV
20 kHz
V
CSL1
= V
REF1
+ 50mV 22 33 46
Ultrasonic Current-Limit
Threshold
SKIP = open (3.3V)
V
CSL2
= V
FB2
+ 50mV 18 30 46
mV
Current-Balance Amplifier (GMI)
Offset
[V(CSH1,CSL1) - V(CSH2,CSL2)] at I
CCI
= 0 -3 +3 mV
Current-Balance Amplifier (GMI)
Transconductance
I
CCI
/[V(CSH1,CSL1) - V(CSH2,CSL2)];
V
CCI
= V
CSL1
= V
CSL2
= 0.5V to 2V, and
V(CSH_,CSL_) = -60.0mV to +60.0mV,
ILIM1 = GND
180 μS
GATE DRIVERS
Low state (pulldown) 1.7 4.0
DH1, DH2 Gate-Driver
On-Resistance
R
ON(DH)
BST_ - LX_ forced
to 5V
High state (pullup) 1.7 4.0
High state (pullup) 1.3 3.0
DL1, DL2 Gate-Driver
On-Resistance
R
ON(DL)
Low state (pulldown) 0.6 2.5
DH1, DH2 Gate-Driver
Source/Sink Current
I
DH
DH_ forced to 2.5V, BST_ - LX_ forced to
5V
1.2 A
DL1, DL2 Gate-Driver
Source Current
I
DL(S OURC E)
DL_ forced to 2.5V 1 A
DL1, DL2 Gate-Driver
Sink Current
I
DL(S INK)
DL_ forced to 2.5V 2.4 A
DH_ low to DL high 10 25 40
Driver Propagation Delay
DL_ low to DH high 15 30 45
ns
MAX17007A/MAX17008
Dual and Combinable QPWM Graphics
Core Controllers for Notebook Computers
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(VIN= 12V, VDD= VCC= V
EN1
= V
EN2
= 5V, V
REFIN1
= 2V, SKIP = GND, TA= 0 to +85°C, unless otherwise noted. Typical values are
at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DL_ fall ing, CDL = 3nF 10 20
DL_ Transition Time
DL_ rising, C
DL
= 3nF 10 20
ns
DH_ falling, CDH = 3nF 10 20
DH_ Transition Time
DH_ ri sing, C
DH
= 3nF 10 20
ns
Internal BST_ Switch
On-Resistance
R
BST_ IBST_
= 10mA, VDD = 5V 6.5 11.0
INPUTS AND OUTPUTS
EN1, EN2 Logic-Input Threshold
EN1, EN2 ris ing edge,
hysteresis = 300mV/600mV (min/max)
1.20 1.70 2.20 V
Logic-Input Current EN1, EN2, TA = +25°C -0.5 +0.5 μA
High (5V)
V
CC
-
0.3
Open (3.3V) 3.0 3.6
Ref (2.0V) 1.7 2.3
Quad-Level Input-Logic Leve ls SKIP, ILIM1, ILIM2
Low (GND) 0.4
V
Quad-Level Logic-Input Current
SKIP, ILIM1, ILIM2 forced to GND or V
CC
,
T
A
= +25°C
-2 +2 μA
ELECTRICAL CHARACTERISTICS
(VIN= 12V, VDD= VCC= V
EN1
= V
EN2
= 5V, V
REFIN1
= 2V, SKIP = GND, TA= -40°C to +105°C, unless otherwise noted.) (Note 4)
PARAMETER SYMBOL CONDITIONS MIN MAX UNITS
PWM CONTROLLER
Input Voltage Range V
IN
4.5 26 V
Quiescent Supply Current
(V
DD
, VCC)
I
DD
+ I
CC
Output forced above regulation vo ltage,
V
EN1
= V
EN2
= 5V
2.5 mA
R
TON1
= R
TON2
=
97.5k (600 kHz)
142 194
R
TON1
= R
TON2
=
200k (300kHz)
305 368
On-Time (Note 1)
t
ON1
,
t
ON2
VIN = 12V,
V
CSL1
= V
CSL2
=
V
CCI
= 1.2V,
separate or
combined mode
R
TON1
= R
TON2
=
302.5 k (200kH z)
425 575
ns
Minimum Off-Time t
OFF(MIN)
(Note 1) 400 ns
REFIN1 Voltage Range V
REFIN1
0 V
REF
V
FB2 Input Voltage Range Preset mode 1.7 2.3 V
FB2 Combined-Mode Threshold Comb ined mode 3.75
V
CC
-
0.4
V
REFIN1, FB2 Bias Current
I
REFIN1
,
I
FB2
-0.1 +0.1 μA
MAX17007A/MAX17008
Dual and Combinable QPWM Graphics
Core Controllers for Notebook Computers
6 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(VIN= 12V, VDD= VCC= V
EN1
= V
EN2
= 5V, V
REFIN1
= 2V, SKIP = GND, TA= -40°C to +105°C, unless otherwise noted.) (Note 4)
PARAMETER SYMBOL CONDITIONS MIN MAX UNITS
REFIN1 Dual-Mode
Switcho ver Threshold
3.75
VCC -
0.4
V
SMPS1 Voltage Accuracy V
CSL1
Measured at CSL1, REFIN1 = V
CC;
VIN = 2V to 26V, SKIP = V
CC
(Note 2)
1.039 1.061 V
SMPS2 Voltage Accuracy V
CSL2
Measured at CSL2, FB2 = REF;
V
IN
= 2V to 26V, SKIP = V
CC
(Note 2)
1.485 1.515 V
INTERNAL REFERENCE
Reference Voltage V
REF
VDD = 4.5V to 5.5V 1.985 2.015 V
FAULT DETECTION
SMPS1 Overvoltage Trip
Threshold and PGOOD1
Upper Threshold
(MAX17007A Only)
V
OVP1
,
V
PG1_H
With respect to the internal target vo ltage
(error comparator threshold); rising edge;
hystere sis = 50mV
260 340 mV
SMPS2 Overvoltage Trip
Threshold and PGOOD2
Upper Threshold
(MAX17007A Only)
V
OVP2
,
V
PG2_H
With respect to the internal target vo ltage
0.7V (error comparator threshold);
hystere sis = 50mV
120 180 mV
SMPS1 Undervoltage Protection
Trip Threshold and Lower
PGOOD1 Threshold
V
UVP1
,
V
PG1_L
With respect to the internal target vo ltage
(error comparator threshold) falling edge;
hystere sis = 50mV
-240 -160 mV
SMPS2 Undervoltage Protection
Trip Threshold and Lower
PGOOD2 Threshold
V
UVP2
,
V
PG2_L
With respect to the internal target vo ltage
0.7V (error comparator threshold)
falling edge; hysteresis = 50mV
-130 -70 mV
Output Undervoltage Fault
Propagati on De lay
t
UVP
REFIN1/FB2 forced 25mV below trip
threshold
90 360 μs
PGOOD_ Propagation Dela y t
PGOOD
Startup delay from regulation 90 360 μs
PGOOD_ Output Low Voltage I
SINK
= 3mA 0.4 V
VCC Undervoltage Lockout
Threshold
V
UVLO(VCC)
Ri sing edge, PWM disab led below this level;
hysteresis = 100mV
3.8 4.45 V
CURRENT LIMIT
CSH1, CSH2 0 2.3
Current-Sense Input Range
CSL1, CSL2 0 2.3
V
Current-Limit Threshold (Fixed) V
CSLIMIT VCSH_
- V
CSL_
, ILIM1 = ILIM2 = REF 27 33 mV
Ultrasonic Frequency
SKIP = OPEN (3.3V);
V
CSL1
= V
REFIN1
+ 50mV;
V
CSL2
= V
FB2
+ 50mV
18 kHz
V
CSL1
= V
REF1
+ 50mV 22 46
Ultrasonic Current-Limit
Threshold
SKIP = OPEN (3.3V)
V
CSL2
= V
FB2
+ 50mV 18 46
mV
Current-Balance Amplifier (GMI)
Offset
[V(CSH1,CSL1) - V(CSH2,CSL2)] at I
CCI
= 0 -3 +3 mV
MAX17007A/MAX17008
Dual and Combinable QPWM Graphics
Core Controllers for Notebook Computers
_______________________________________________________________________________________ 7
Note 1: On-time and off-time specifications are measured from 50% point to 50% point at the DH pin with LX = GND, V
BST
= 5V, and
a 250pF capacitor connected from DH to LX. Actual in-circuit times might differ due to MOSFET switching speeds.
Note 2: The 0 to 0.5V range is guaranteed by design, not production tested.
Note 3: Not production tested.
Note 4: Specifications at T
A
= -40°C to +105°C are guaranteed by design, not production tested.
ELECTRICAL CHARACTERISTICS (continued)
(VIN= 12V, VDD= VCC= V
EN1
= V
EN2
= 5V, V
REFIN1
= 2V, SKIP = GND, TA= -40°C to +105°C, unless otherwise noted.) (Note 4)
PARAMETER SYMBOL CONDITIONS MIN MAX UNITS
GATE DRIVERS
Low state (pulldown) 4.5
DH1, DH2 Gate-Driver
On-Resistance
R
ON(DH)
BST_ - LX_ forced to
5V
High state (pullup) 4.0
High state (pullup) 3
DL1, DL2 Gate-Driver
On-Resistance
R
ON(DL)
Low state (pulldown) 2.5
DH_ low to DL high 8 42
Driver Propagation Delay
DL_ low to DH high 12 48
ns
Internal BST_ Switch
On-Resistance
R
BST_ IBST_
= 10mA, VDD = 5V 12
INPUTS AND OUTPUTS
EN1, EN2 Logic-Input Threshold
EN1, EN2 ris ing edge;
hysteresis = 300mV/600mV (min/max)
1.20 2.20 V
High (5V)
V
CC
-
0.3
Open (3.3V) 3.0 3.6
Ref (2.0V) 1.7 2.3
Quad-Level Input Logic Levels SKIP, ILIM1, ILIM2
Low (GND) 0.4
V
MAX17007A/MAX17008
Dual and Combinable QPWM Graphics
Core Controllers for Notebook Computers
8 _______________________________________________________________________________________
Typical Operating Characteristics
(Circuit of Figure 1, VIN= 12V, VDD= 5V, SKIP = GND, TA= +25°C, unless otherwise noted.)
SMPS2 1.5V EFFICIENCY
vs. LOAD CURRENT
MAX17007A/8 toc01
LOAD CURRENT (A)
EFFICIENCY (%)
1010.1
50
60
70
80
90
100
40
20
30
10
0.01 100
6V
12V
20V
SKIP MODE
PWM MODE
SMPS2 1.5V EFFICIENCY
vs. LOAD CURRENT
MAX17007A/8 toc02
LOAD CURRENT (A)
EFFICIENCY (%)
1010.1
50
60
70
80
90
100
40
20
30
10
0.01 100
SKIP MODE
PWM MODE
VIN = 12V
ULTRASONIC
MODE
SMPS2 1.5V OUTPUT VOLTAGE
vs. LOAD CURRENT
MAX17007A/8 toc03
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)
105
1.50
1.52
1.54
1.48
015
SKIP MODE
ULTRASONIC MODE
PWM
VIN = 12V
COMBINED 1.2V EFFICIENCY
vs. LOAD CURRENT
MAX17007A/8 toc04
LOAD CURRENT (A)
EFFICIENCY (%)
1010.1
50
60
70
80
90
100
40
20
30
10
0.01 100
SKIP MODE
PWM MODE
6V
12V
20V
COMBINED 1.2V OUTPUT VOLTAGE
vs. LOAD CURRENT
MAX17007A/8 toc05
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)
16 20842412
1.19
1.20
1.21
1.22
1.18
028
SKIP MODE
PWM
VIN = 12V
SMPS2 SWITCHING FREQUENCY
vs. LOAD CURRENT
MAX17007A/8 toc06
LOAD CURRENT (A)
SWITCHING FREQUENCY (kHz)
1010.1
200
250
300
350
150
50
100
0
0.01 100
SKIP MODE
PWM MODE
VIN = 12V
ULTRASONIC
MODE
SMPS2 SWITCHING FREQUENCY
vs. INPUT VOLTAGE
MAX17007A/8 toc07
INPUT VOLTAGE (V)
SWITCHING FREQUENCY (kHz)
20424
250
300
350
200
02881216
VIN = 12V
SKIP = 5V
I
OUT2
= 5A
I
OUT2
= 0A
SMPS2 SWITCHING FREQUENCY
vs. TEMPERATURE
MAX17007A/8 toc08
TEMPERATURE (°C)
SWITCHING FREQUENCY (kHz)
040-20 60
290
270
310
330
250
-40 1201008020
VIN = 12V
SKIP = 5V
I
OUT2
= 5A
I
OUT2
= 0A
SMPS2 MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
MAX17007A/8 toc09
INPUT VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (A)
20424
12
11
13
14
10
02881216
MAX17007A/MAX17008
Dual and Combinable QPWM Graphics
Core Controllers for Notebook Computers
_______________________________________________________________________________________ 9
SMPS2 MAXIMUM OUTPUT CURRENT
vs. TEMPERATURE
MAX17007A/8 toc10
TEMPERATURE (°C)
MAXIMUM OUTPUT CURRENT (A)
80400
11
12
13
14
10
-40 1206020-20 100
VIN = 12V
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX17007A/8 toc11
INPUT VOLTAGE (V)
SUPPLY CURRERT (I
BIAS
) (mA)
2016
4
8
12
16
0
6
10
14
2
424812
SKIP MODE
PWM MODE
ULTRASONIC MODE
EN1 = HIGH
EN2 = LOW
NO-LOAD INPUT CURRENT
vs. INPUT VOLTAGE
MAX17007A/8 toc12
INPUT VOLTAGE (V)
INPUT CURRENT (mA)
2016
0.1
1
10
100
0.01
424812 1814 22610
SKIP MODE
PWM MODE
ULTRASONIC MODE
EN1 = HIGH
EN2 = LOW
REFERENCE VOLTAGE
vs. REFERENCE LOAD CURRENT
MAX17007A/8 toc13
REFERENCE LOAD CURRENT (μA)
REFERENCE VOLTAGE (V)
8060
1.99
1.97
2.01
2.03
2.05
1.95
-20 10020 400
REFIN1 TO CSL1 OFFSET VOLTAGE
DISTRIBUTION
MAX17007A/8 toc14
OFFSET VOLTAGE (mV)
SAMPLE PERCENTAGE (%)
3.0
60
50
70
80
20
10
30
40
90
0
-5.0 5.0-1.0 1.0-3.0
SAMPLE SIZE = 100
TA = +85°C
T
A
= +25°C
SMPS1 PRESET 1.05V
VOLTAGE DISTRIBUTION
MAX17007A/8 toc15
SMPS1 VOLTAGE (mV)
SAMPLE PERCENTAGE (%)
1.053
60
50
70
80
20
10
30
40
90
0
1.045 1.0551.049 1.0511.047
SAMPLE SIZE = 100
TA = +85°C
T
A
= +25°C
SMPS2 PRESET 1.5V
VOLTAGE DISTRIBUTION
MAX17007A/8 toc16
SMPS2 VOLTAGE (mV)
SAMPLE PERCENTAGE (%)
1.503
15
10
20
25
5
30
0
1.495 1.5051.499 1.5011.497
SAMPLE SIZE = 100
TA = +85°C
T
A
= +25°C
COMBINED-MODE CURRENT BALANCE
vs. LOAD CURRENT
MAX17007A/8 toc17
LOAD CURRENT (A)
V
CSH -
V
CSL
(mV)
201552510
50
40
20
10
30
0
030
SMPS1
SMPS2
SOFT-START WAVEFORM
MAX17007A/8 toc18
400μs/div
A
B
E
F
C
D
5V
A. EN1, EN2, 5V/div
B. REF, 2V/div
C. V
OUT1
, 1V/div
D. V
OUT2
, 1V/div
E. PGOOD1, 5V/div
F. PGOOD2, 5V/div
0
2V
0
5V
0
0
5V
0
1.05V
1.5V
0
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN= 12V, VDD= 5V, SKIP = GND, TA= +25°C, unless otherwise noted.)
MAX17007A/MAX17008
Dual and Combinable QPWM Graphics
Core Controllers for Notebook Computers
10 ______________________________________________________________________________________
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN= 12V, VDD= 5V, SKIP = GND, TA= +25°C, unless otherwise noted.)
SMPS1 STARTUP WAVEFORM
(HEAVY LOAD)
MAX17007A/8 toc19
200μs/div
A
B
E
F
G
C
D
5V
A. EN1, 5V/div
B. REF, 2V/div
C. V
OUT1
, 500mV/div
D. I
LX1
, 10A/div
E. PGOOD1, 10V/div
F. LX1, 10V/div
G. DL1, 10V/div
0
2V
5V
0
12V
0
5V
0
0
1.05V
0
8A
I
OUT1
= 8A
SMPS1 STARTUP WAVEFORM
(LIGHT LOAD)
MAX17007A/8 toc20
200μs/div
A
B
E
F
G
C
D
5V
A. EN1, 5V/div
B. REF, 2V/div
C. V
OUT1
, 500mV/div
D. I
LX1
, 5A/div
SKIP = 5V
I
OUT1
= 2A
E. PGOOD1, 10V/div
F. LX1, 10V/div
G. DL1, 10V/div
0
2V
0
1.05V
0
2A
0
5V
0
5V
0
0
12V
SMPS1 SHUTDOWN WAVEFORM
MAX17007A/8 toc21
200μs/div
A
B
E
F
G
C
D
5V
A. EN1, 5V/div
B. REF, 5V/div
C. V
OUT1
, 500mV/div
D. I
LX1
, 5A/div
E. PGOOD1, 10V/div
F. LX1, 10V/div
G. DL1, 10V/div
I
OUT1
= 0.5A
SKIP = GND
0
2V
1.05V
0
0
0
5V
0
5V
0
12V
SMPS2 LOAD-TRANSIENT RESPONSE
(PWM MODE)
MAX17007A/8 toc22
20μs/div
A
B
C
A. V
OUT2
, 50mV/div
B. I
LX2
, 10A/div
C. LX2, 10V/div
1.5V
10A
2A
12V
0
I
OUT2
= 2A TO 10A TO 2A
SKIP = 5V
SMPS2 LOAD-TRANSIENT RESPONSE
(SKIP MODE)
MAX17007A/8 toc23
20μs/div
A
B
C
A. V
OUT2
, 50mV/div
B. I
LX2
, 10A/div
C. LX2, 10V/div
1.5V
8A
0A
12V
0
I
OUT2
= 0.5A TO 8.5A TO 0.5A
SKIP = GND
SMPS1 OUTPUT OVERLOAD WAVEFORM
MAX17007A/8 toc24
200μs/div
A
B
E
C
D
I
OUT1
= 2A TO 15A
A. V
OUT1
, 500mV/div
B. I
LX1
, 10A/div
C. LX1, 10V/div
1.05V
10A
2A
5V
0
5V
12V
0
0
D. PGOOD1, 5V/div
E. DL1, 5V/div
SMPS1 OUTPUT OVERVOLTAGE
WAVEFORM
MAX17007A/8 toc25
40μs/div
A
B
C
A. V
OUT1
, 1V/div
B. PGOOD1, 5V/div
C. DL1, 5V/div
1.05V
0
5V
0
5V
0
MAX17007A/MAX17008
Dual and Combinable QPWM Graphics
Core Controllers for Notebook Computers
______________________________________________________________________________________ 11
DYNAMIC OUTPUT VOLTAGE
TRANSITION (PWM MODE)
MAX17007A/8 toc26
20μs/div
A
B
C
D
I
OUT1
= 2A
REFIN1 = 1V
TO 1.2V TO 1V
1.2V
1V
0
2A
12V
0
5V
A. V
OUT1
, 100mV/div
B. I
LX1
, 10A/div
C. LX1, 10V/div
D. DL1, 5V/div
SKIP = 5V
DYNAMIC OUTPUT VOLTAGE
TRANSITION (SKIP MODE)
MAX17007A/8 toc27
40μs/div
A
B
C
D
I
OUT1
= 1A
1.2V
1V
0
0
12V
0
5V
A. V
OUT1
, 100mV/div
B. I
LX1
, 10A/div
C. LX1, 10V/div
D. DL1, 5V/div
REFIN1 = 1V
TO 1.2V TO 1V
SKIP = GND
DYNAMIC OUTPUT-VOLTAGE TRANSITION
(SKIP MODE-FORCED TRANSITION)
MAX17007A/8 toc28
20μs/div
A
B
C
D
1.2V
1V
0
0
12V
0
5V
A. V
OUT1
, 100mV/div
B. I
LX2
, 10A/div
I
OUT1
= 1A
REFIN1 = 1V TO 1.2V TO 1V
SKIP = REF
C. LX1, 10V/div
D. DL1, 5V/div
I
OUT1
= 3A
Pin Description
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN= 12V, VDD= 5V, SKIP = GND, TA= +25°C, unless otherwise noted.)
PIN NAME FUNCTION
1 REF
2V Reference Voltage Output. B ypass REF to GND with a 2.2nF ceramic capac itor. The reference
can source up to 100μA. Load ing REF degrades output-voltage accuracy according to the REF
load regulation error (see theTypical Operating Characteristics). The reference shuts down when
both EN1 and EN2 are low.
2 ILIM1
Thi s four-level input determines the CSH1 to CSL1 current li mit for SMPS1:
V
CC
(5V) = 60mV current lim it
Open (3.3V) = 45mV current limit
REF (2V) = 30mV current limit
GND = 15mV current limit
In combined mode, ILIM1 sets the current-limit threshold for both sides.
Thi s four-level input determines the CSH2 to CSL2 current li mit for SMPS2:
V
CC
(5V) = 60mV current lim it
Open (3.3V) = 45mV current limit
REF (2V) = 30mV current limit
GND = 15mV current limit
In combined mode, ILIM2 is the current balance integrator (CCI) output pin. Connect a capacitor
(C
CCI
) between CCI and the output. The CCI capacitor va lue depends on the ILIM1 setting based
on the following table:
ILIM1 C
CCI
at ILIM2 (pF)
VCC (5V) 120
Open (3.3V) 180
REF (2V) 220
3
ILIM2
(CCI)
GND 470
4 V
CC
5V Analog Supply Input. Bypass VCC from VDD using a 10 resistor, and to analog ground us ing a
1μF ceramic capacitor.
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