ISL78227 Datasheet, PDF (14/43 Pages) Intersil Corporation – 2-Phase Boost Controller with Integrated Drivers

ISL78227
Electrical Specifications Refer to Figure 3 on page 7 and Typical Application Schematics (page 8). Operating conditions unless
otherwise noted: V_IN = 12V, V_PVCC = 5.2V and V_VCC = 5.2V, T_A = -40°C to +125°C (Note 7). Typicals are at T_A = +25°C. Boldface limits apply across
the operating temperature range, -40°C to +125°C. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
MAX
(Note 6) TYP (Note 6) UNIT
OUTPUT UNDERVOLTAGE DETECTION (MONITOR THE FB PIN, (Refer to “Output Undervoltage Indication” on page 34 for details)
Undervoltage Falling Trip Threshold
Undervoltage Rising Recovery Threshold
Undervoltage Threshold Hysteresis
V_{FBUVREF_FALL} Percentage of VREF_1.6V
V_{FBUVREF_RISE} Percentage of VREF_1.6V
78
82.5
80
84.0
4
82
%
86.5 %
%
POWER-GOOD MONITOR (PGOOD PIN)
PGOOD Leakage Current
PGOOD Low Voltage
PGOOD Rising Delay (DE mode)
PGOOD HIGH, V_PGOOD = 5V
PGOOD LOW, I_PGOOD = 0.5mA
The PGOOD rising delay from
V_SSPIN = V_SSPCLAMP (3.47V) and
VREF_TRK ≥ 0.3V to PGOOD HIGH when DE
mode is selected (DE/PHDRP = VCC or
FLOAT)
0.06
0.5
1
µA
0.40 V
ms
PGOOD Rising Delay (CCM mode)
The PGOOD rising delay from
100
ms
V_SSPIN = V_SSPCLAMP (3.47V) and
VREF_TRK ≥ 0.3V to PGOOD HIGH when CCM
mode is selected (DE/PHDRP = GND)
PGOOD Falling Blanking Time
10
µs
HIC/LATCH, ATRK/DTRK PIN DIGITAL LOGIC INPUT
Input Leakage Current
EN <1V
-1
1
µA
Input Pull Down Current
EN >2V, Pin Voltage = 2.1V
0.7
1.0
2.0 µA
Logic Input Low
0.8
V
Logic Input High
2.1
V
DE/PHDRP PIN DIGITAL LOGIC INPUT (HIGH/LOW/FLOAT)
Input Leakage Current
-1
1
µA
FLOAT Impedance - PIN to VCC
PIN = GND
100
200
300 kΩ
FLOAT Impedance - PIN to GND
PIN = VCC
100
200
300 kΩ
Output Voltage on FLOAT Pin
PIN = FLOAT
2.1
2.6
2.7
V
Tri-State Input Voltage MAX
3
V
Tri-State Input Voltage MIN
1.8
V
Logic Input Low
PIN voltage falling
0.7
V
Logic Input High
PIN voltage rising
VCC -
V
0.4
TRACK PIN - DIGITAL INPUT LOGIC
Input Leakage Current
Input Pull-Up Current
Input Pull-Up Current Compliance Voltage
EN <1V, pin voltage = 5V, V_CC = 0V
EN >2V, pin voltage = 0V, V_CC = 5V
EN >2V, pin open
-1
1
µA
0.8
1.1
1.5 µA
2.5
V
Logic Input Low
PIN voltage falling
0.8
V
Logic Input High
PIN voltage rising
2
V
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FN8808.2
February 24, 2016