ISL9187 Intersil Corporation, ISL9187 Datasheet - Page 3

• Manufacturer Part Number: ISL9187
• Description: (ISL9107 / ISL9108) 1.5A 1.6MHz Low Quiescent Current High Efficiency Synchronous Buck Regulator
• Manufacturer: Intersil Corporation

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Electrical Specifications
Pin Descriptions
PG (NOTE 1)
Output Low Voltage
Delay Time
PG Pin Leakage Current
Minimum Supply Voltage for Valid PG Signal
Internal PGOOD Low Rising Threshold
Internal PGOOD Low Falling Threshold
Internal PGOOD High Rising Threshold
Internal PGOOD High Falling Threshold
Internal PGOOD Delay Time
RSI (NOTE 1), EN, MODE
Logic Input Low
Logic Input High
Logic Input Leakage Current
Thermal Shutdown
Thermal Shutdown Hysteresis
E-PAD
PIN #
1
2
4
6
7
8
3
5
PIN NAME
ISL9107
RSI
PG
PARAMETER
MODE
GND
VIN
SW
EN
FB
-
PIN NAME
ISL9108
NC
NC
3
Unless otherwise noted, all parameter limits are guaranteed over the recommended operating conditions and
the typical specifications are measured at the following conditions: T
C
Input supply voltage pin. Connect a 10µF ceramic capacitor to power ground
Enable pin. Enable the output when driven to high. Shut down the chip and discharge output capacitor when
driven to low. Do not leave this pin floating.
Mode selection pin. Connect to logic high or VIN to enable skip mode; connect to logic low or ground for force
PWM mode.
Buck regulator output feedback pin. Connect to the output voltage through voltage divider resistors for
adjustable output voltage.
System ground.
Switching node pin. Connect to one terminal of the inductor.
Exposed pad. It should be connected to ground for proper electrical performance. The exposed pad must also
be connected to as much as possible for optimal thermal performance.
For ISL9107, it is 215ms timer output. It outputs 215ms delayed power-good signal when output voltage is
within power-good window. It can be reset by a high RSI signal, then 215ms starts when RSI goes from high
to low.
For ISL9108, do not connect. Leave this pin floating.
For ISL9107, this input resets the 215ms timer. Please refer to “Theory of Operation” on page 9 for more
details.
For ISL9108, do not connect. Leave this pin floating.
1
= 10µF, C
2
SYMBOL
= 10µF, I
OUT
ISL9107, ISL9108
Sinking 1mA, VFB = 0.7V
PG = V
Percentage of Nominal Regulation Voltage
Percentage of Nominal Regulation Voltage
Percentage of Nominal Regulation Voltage
Percentage of Nominal Regulation Voltage
Pulled up to 5.5V
= 0A (see the Typical Application Circuit on page 7). (Continued)
IN
= 3.6V
TEST CONDITIONS
DESCRIPTION
.
A
= +25°C, V
108.2
89.5
MIN
150
104
1.2
1.4
85
-
-
-
-
-
-
-
IN
110.7
TYP
0.01
= V
215
107
150
0.1
92
88
50
25
-
-
-
-
EN
= 3.6V, L = 2.2µH,
113.2
MAX
94.5
275
110
0.3
0.1
0.4
91
1
-
-
-
-
-
December 21, 2007
UNITS
FN6612.0
ms
µA
µA
µs
°C
°C
%
%
%
%
V
V
V
V