DATASHEET
ISL9307
3MHz Dual 1500mA Step-Down Converters and Dual Low-Input LDOs
The ISL9307 is an integrated mini Power Management IC
(mini-PMIC) ideal for applications for powering low-voltage
microprocessor or multiple voltage rails with a battery as an
input source, such as a single Li-ion or Li-polymer. ISL9307
integrates two high-efficiency, 3MHz, synchronous step-down
converters (DCD1 and DCD2) and two low-input, low-dropout
linear regulators (LDO1 and LDO2).
The 3MHz PWM switching frequency allows the use of very
small external inductors and capacitors. Both step-down
converters can enter skip mode under light load conditions to
further improve efficiency and maximize battery life.
The ISL9307 features EN pins for each channel, thus allowing
startup delay for power sequencing.
The ISL9307 also provides two 300mA low-dropout (LDO)
regulators. The input voltage range is 1.5V to 5.5V, which
allows them to be powered from one of the on-chip step-down
converters or directly from a battery. The default LDO power-up
output comes with factory pre-set fixed output voltage options
between 0.9V and 3.3V.
The ISL9307 is available in a 4mmx4mm 16 Ld TQFN.
FN7931
Rev 3.00
September 20, 2012
Features
• Dual 1500mA, Synchronous Step-down Converters and Dual
300mA, General-purpose LDOs
• Input Voltage Range
- DCD1/DCD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5V to 5.5V
- VINLDO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5V to 5.5V
• Adjustable Output Voltage
- VODCD1/VODCD2 . . . . . . . . . . . . . . . . . . . . . . . . 0.8V to V
IN
• 50μA I
Q
(Typ) with DCD1/DCD2 in Skip Mode; 20μA I
Q
(Typ)
for each Enabled LDO
• EN Pins for DCD1/DCD2 and LDO1/LDO2
• Small, Thin, 4mmx4mm TQFN
Applications
• Cellular Phones, Smart Phones
• PDAs, Portable Media Players, Portable Instruments
• Single Li-ion/Li-polymer Battery-Powered Equipment
• DSP Core Power
L
1
= 1.5µH
2.5V TO 5.5V
C
1
10µF
VINDCD1
VINDCD2
ENDCD1
ENDCD2
SW 2
ISL9307
ENLDO1
ENLDO2
1.5V TO 5.5V
C
2
1µF
VINLDO
VOLDO1
VOLDO2
GNDDCD1
GNDDCD2
GNDLDO
C
6
1µF
C
7
1µF
300m A
300m A
FB2
R
3
R
4
L
2
= 1.5µH
1500m A
C
5
10µF
SW 1
FB1
R
1
R
2
1500m A
C
4
10µF
NOTE: ONLY FOR ADJUSTABLE OUTPUT VERSION . FOR FIXED
OUTPUT VERSION, DIRECTLY CONNECT THE FB PIN TO THE
OUTPUT OF THE BUCK CONVERTER .
FIGURE 1. TYPICAL APPLICATION DIAGRAM
FN7931 Rev 3.00
September 20, 2012
Page 1 of 13
ISL9307
TABLE 1. TYPICAL APPLICATION PART LIST
PARTS
L1, L2
C1
C2, C3
C4, C5
C6, C7
R1, R2,
R3, R4
DESCRIPTION
Inductor
Input capacitor
Input capacitor
Output capacitor
Output capacitor
Resistor
MANUFACTURER
Sumida
Murata
Murata
Murata
Murata
Various
PART NUMBER
CDRH2D14NP-1R5
GRM21BR60J106KE19L
GRM185R60J105KE26D
GRM21BR60J106KE19L
GRM185R60J105KE26D
SPECIFICATIONS
1.5µH/1.80A/50mΩ
10µF/6.3V
1µF/6.3V
4.7µF/6.3V
10µF/6.3V
1%, SMD, 0.1Ω
SIZE
3.0mmx3.0mmx1.55mm
0805
0603
0805
0603
0603
Block Diagram
SHORT
CIRCUIT
PROTECTION
ENDCD1
ANALOG/LOGIC
CIRCUIT INPUT
VINDCD1
1.5µH
DCD1
BUCK
CONVERTER
OVER-
CURRENT
PROTECTION
DCD2
BUCK
CONVERTER
SW1
FB1
GNDDCD1
VINDCD2
1.5µH
SW2
FB2
GNDDCD2
4.7µF
10µF
4.7µF
10µF
ENDCD2
THERMAL
SHUTDOWN
LDO1
300mA
VINLDO
1µF
VOLDO1
1µF
ENLDO1
ENLDO2
LDO2
300mA
VOLDO2
GNDLDO
1µF
FN7931 Rev 3.00
September 20, 2012
Page 2 of 13
ISL9307
Pin Configuration
ISL9307
(16 LD 4X4 TQFN)
TOP VIEW
14 GNDDCD2
15 GNDCDC1
16 SW1
VINDCD1 1
FB1 2
ENDCD1 3
ENLDO1 4
ENLDO2 8
VOLDO2 7
VOLDO1 6
VINLDO 5
E-PAD
13 SW2
12 VINDCD2
11 FB2
10 ENDCD2
9 GNDLDO
Pin Descriptions
PIN
NUMBER
(TQFN)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
E-pad
NAME
VINDCD1
FB1
ENDCD1
ENLDO1
VINLDO
VOLDO1
VOLDO2
ENLDO2
GNDLDO
ENDCD2
FB2
VINDCD2
SW2
GNDDCD2
GNDDCD1
SW1
E-pad
DESCRIPTION
Input voltage for buck converter DCD1 and power supply pin for all internal digital/ analog circuits.
Feedback pin for DCD1; connect external voltage divider resistors between DCDC1 output, this pin, and ground. For
fixed output versions, connect this pin directly to the DCD1 output.
Enable pin for DCD1. Tie high or low. Do not float.
Enable pin for LDO1. Tie high or low. Do not float.
Input voltage for LDO1 and LDO2
Output voltage of LDO1
Output voltage of LDO2
Enable pin for LDO2. Tie high or low. Do not float.
Power ground for LDO1 and LDO2
Enable pin for DCD2. Tie high or low. Do not float.
Feedback pin for DCD2; connect external voltage divider resistors between DCD2 output, this pin, and ground. For
fixed output versions, connect this pin directly to the DCD2 output.
Input voltage for buck converter DCD2
Switching node for DCD2; connect to one terminal of the inductor.
Power ground for DCD2
Power ground for DCD1
Switching node for DCD1; connect to one terminal of the inductor.
Exposed pad; connect to system ground.
FN7931 Rev 3.00
September 20, 2012
Page 3 of 13
ISL9307
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
ISL9307IRTAAJBZ-T
ISL9307IRTAAJBZ-T7A
ISL9307IRTAAJFZ-T
ISL9307IRTAAJFZ-T7A
ISL9307IRTAAJGZ-T
ISL9307IRTAAJGZ-T7A
ISL9307IRTAAJLZ-T
ISL9307IRTAAJLZ-T7A
ISL9307IRTAAJYZ-T
ISL9307IRTAAJYZ-T7A
ISL9307IRTAANCZ-T
ISL9307IRTAANCZ-T7A
ISL9307IRTAANFZ-T
ISL9307IRTAANFZ-T7A
ISL9307IRTAANGZ-T
ISL9307IRTAANGZ-T7A
ISL9307IRTAANLZ-T
ISL9307IRTAANLZ-T7A
ISL9307IRTAANWZ-T
ISL9307IRTAANWZ-T7A
ISL9307IRTAANYZ-T
ISL9307IRTAANYZ-T7A
ISL9307IRTWCNJZ-T
ISL9307IRTWCNJZ-T7A
ISL9307IRTWCWNZ-T
ISL9307IRTWCWNZ-T7A
ISL9307IRTAAJBEV1Z
ISL9307IRTAAJFEV1Z
ISL9307IRTAAJGEV1Z
ISL9307IRTAAJLEV1Z
ISL9307IRTAAJYEV1Z
ISL9307IRTAANCEV1Z
ISL9307IRTAANFEV1Z
ISL9307IRTAANGEV1Z
ISL9307IRTAANLEV1Z
ISL9307IRTAANWEV1Z
ISL9307IRTAANYEV1Z
ISL9307IRTWCNJEV1Z
ISL9307IRTWCWNEV1Z
NOTES:
1. Please refer to
TB347
for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil
Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for
ISL9307.
For more information on MSL please see Tech Brief
TB363.
PART MARKING
9307I AAJBZ
9307I AAJBZ
9307I AAJFZ
9307I AAJFZ
9307I AAJGZ
9307I AAJGZ
9307I AAJLZ
9307I AAJLZ
9307I AAJYZ
9307I AAJYZ
9307I AANCZ
9307I AANCZ
9307I AANFZ
9307I AANFZ
9307I AANGZ
9307I AANGZ
9307I AANLZ
9307I AANLZ
9307I AANWZ
9307I AANWZ
9307I AANYZ
9307I AANYZ
9307I WCNJZ
9307I WCNJZ
9307I WCWNZ
9307I WCWNZ
Evaluation Board
Evaluation Board
Evaluation Board
Evaluation Board
Evaluation Board
Evaluation Board
Evaluation Board
Evaluation Board
Evaluation Board
Evaluation Board
Evaluation Board
Evaluation Board
Evaluation Board
FBSEL
DCD1
(V)
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
1.2
1.2
1.2
1.2
FBSEL
DCD2
(V)
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
1.8
1.8
1.8
1.8
SLV
LDO1
(V)
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
1.2
1.2
SLV
LDO2
(V)
1.5
1.5
2.5
2.5
2.7
2.7
2.9
2.9
0.9
0.9
1.8
1.8
2.5
2.5
2.7
2.7
2.9
2.9
1.2
1.2
0.9
0.9
2.8
2.8
3.3
3.3
TEMP. RANGE
(°C)
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
PACKAGE
(Pb-free)
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
16 Ld TQFN
PKG.
DWG. #
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
L16.4X4G
FN7931 Rev 3.00
September 20, 2012
Page 4 of 13
ISL9307
Absolute Maximum Ratings
(Refer to Ground)
SW1, SW2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.5V to 6.5V
FB1, FB2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 3.6V
GNDDCD1, GNDDCD2, GNDLDO. . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 0.3V
All other pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.5V
ESD Ratings
Human Body Model (Tested per JESD22-A114F) . . . . . . . . . . . . . . .3.5kV
Machine Model (Tested per JESD22-A115-A) . . . . . . . . . . . . . . . . . 225V
Charged Device Model (Tested per JESD22-C101D) . . . . . . . . . . . .2.2kV
Latch Up (Tested per JESD78B, Class II, Level A) . . . . . . . . . . . . . . . 100mA
Thermal Information
Thermal Resistance (Typical)
JA
(°C/W)
16 Ld TQFN Package (Note 4). . . . . . . . . . . . . . . . . . . . .
40.2
Maximum Junction Temperature Range . . . . . . . . . . . . . .-40°C to +150°C
Recommended Junction Temperature Range . . . . . . . . .-40°C to +125°C
Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Recommended Operating Conditions
VINDCD1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5V to 5.5V
VINDCD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3V to VINDCD1
VINLDO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5V to VINDCD1
DCD1 and DCD2 Output Current . . . . . . . . . . . . . . . . . . . . 0mA to 1500mA
LDO1 and LDO2 Output Current . . . . . . . . . . . . . . . . . . . . . . 0mA to 300mA
Operating Ambient Temperature . . . . . . . . . . . . . . . . . . . . . -40
°
C to +85
°
C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTE:
4.
JA
is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech
Brief
TB379.
Unless otherwise noted, typical specifications are measured at the following conditions: T
A
= +25°C,
VINDCD1 = 3.6V, VINDCD2 = 3.3V. For LDO1 and LDO2, VINLDO = VOLDO + 0.5V to 5.5V with VINLDO always no higher than VINDCD1.
L
1
= L
2
= 1.5µH, C
1
= C
4
= C
5
= 10µF, C
2
= C
6
= C
7
= 1µF, I
OUT
= 0A for DCD1, DCD2, LDO1 and LDO2 (see Figure 1 on page 1 for more details).
Boldface limits apply over the operating temperature range, -40°C to +85°C.
PARAMETER
VINDCD1, VINDCD2 Voltage Range
VINDCD1, VINDCD2 Undervoltage
Lockout Threshold
Quiescent Supply Current on VINDCD1
V
UVLO
Rising
Falling
I
VIN1
I
VIN2
I
VIN3
I
VIN4
I
VIN5
Shutdown Supply Current
Thermal Shutdown
Thermal Shutdown Hysteresis
I
SD
Only DCD1 enabled; no load and no switching
on DCD1
Only DCD1 and LDO1 enabled; no load and no
switching on DCD1
Both DCD1 and DCD2 enabled; no load and no
switching on both DCD1 and DCD2
Only LDO1 and LDO2 enabled
DCD1, DCD2, LDO1 and LDO2 enabled; no load
and no switching on both DCD1 and DCD2
VINDCD1 = 5.5V; DCD1, DCD2, LDO1 and LDO2
disabled
SYMBOL
TEST CONDITIONS
MIN
(Note 5)
2.5
-
1.9
-
-
-
-
-
-
-
-
TYP
-
2.2
2.1
40
60
50
110
135
0.15
155
30
MAX
(Note 5)
5.5
2.3
-
60
95
75
130
160
5
-
-
UNIT
V
V
V
µA
µA
µA
µA
µA
µA
°C
°C
Electrical Specifications
DCD1 AND DCD2
FB1, FB2 Regulation Voltage
FB1, FB2 Bias Current
Output Voltage Accuracy
Line Regulation
Maximum Output Current
V
FB
I
FB
FB = 0.75V
V
IN
= V
O
+ 0.5V to 5.5V (minimal 2.5V), 1mA
load
V
IN
= V
O
+ 0.5V to 5.5V (minimal 2.5V)
0.785
-
-3
-
1500
0.8
0.001
-
0.1
-
0.815
-
+3
-
-
V
µA
%
%/V
mA
FN7931 Rev 3.00
September 20, 2012
Page 5 of 13
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